Kingdom of the Two Sicilies
The Kingdom of the Two Sicilies (Neapolitan: Regno d’ ’e Ddoje Sicilie; Sicilian: Regnu dî Dui Sicili; Italian: Regno delle Due Sicilie; Spanish: Reino de las Dos Sicilias) was a kingdom located in Southern Italy from 1816 to 1860. The kingdom was the largest sovereign state by population and size in Italy prior to Italian unification, comprising Sicily and all of the peninsula of Italy south of the Papal States, covering most of the area of today's Mezzogiorno.
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Kingdom of the Two Sicilies
Regno delle Due Sicilie
Anthem: "Inno al Re"
("Hymn to the King")
The Kingdom of the Two Sicilies in 1839
|Common languages||Administrative: Italian and Latin|
In use: Neapolitan and Sicilian language
|Government||Absolute monarchy (1816–1848)|
Constitutional monarchy (1849–1861)
• Annexed by Kingdom of Sardinia
|1851||111,900 km2 (43,200 sq mi)|
|Currency||Two Sicilies ducat|
|Today part of||Italy|
The kingdom was formed when the Kingdom of Sicily merged with the Kingdom of Naples, which was officially also known as the Kingdom of Sicily. Since both kingdoms were named Sicily, they were collectively known as the "Two Sicilies" (Utraque Sicilia, literally "both Sicilies"), and the unified kingdom adopted this name. The King of the Two Sicilies was overthrown by Giuseppe Garibaldi in 1860, after which the people supposedly voted in a plebiscite to join the Savoyard Kingdom of Sardinia. The annexation of the Kingdom of the Two Sicilies completed the first phase of Italian unification, and the new Kingdom of Italy was proclaimed in 1861.
The name "Two Sicilies" originated from the partition of the medieval Kingdom of Sicily. Until 1285, the island of Sicily and the Mezzogiorno were constituent parts of the Kingdom of Sicily. As a result of the War of the Sicilian Vespers (1282–1302), the King of Sicily lost the Island of Sicily (also called Trinacria) to the Crown of Aragon, but remained ruler over the peninsular part of the realm. Although his territory became known unofficially as the Kingdom of Naples, he and his successors never gave up the title "King of Sicily" and still officially referred to their realm as the "Kingdom of Sicily". At the same time, the Aragonese rulers of the Island of Sicily also called their realm the "Kingdom of Sicily". Thus, there were two kingdoms called "Sicily": hence, the Two Sicilies.
Origins of the two kingdoms
In 1130 the Norman king Roger II formed the Kingdom of Sicily by combining the County of Sicily with the southern part of the Italian Peninsula (then known as the Duchy of Apulia and Calabria) as well as with the Maltese Islands. The capital of this kingdom was Palermo — which is on the island of Sicily.
During the reign of Charles I of Anjou (1266–1285), the War of the Sicilian Vespers (1282–1302) split the kingdom. Charles, who was of French origin, lost the island of Sicily to the House of Barcelona, who were from Aragon and Catalan. Charles remained king of the peninsular region, which became informally known as the Kingdom of Naples. Officially Charles never gave up the title of "The Kingdom of Sicily", thus there existed two separate kingdoms calling themselves "Sicily".
Aragonese and Spanish direct rule
Only with the Peace of Caltabellotta (1302), sponsored by Pope Boniface VIII, did the two kings of "Sicily" recognize each other's legitimacy; the island kingdom then became the "Kingdom of Trinacria" in official contexts, though the populace still called it Sicily.[better source needed] In 1442, Alfonso V of Aragon, king of insular Sicily, conquered Naples and became king of both.
Alfonso V called his kingdom in Latin "Regnum Utriusque Siciliæ", meaning "Kingdom of both Sicilies". At the death of Alfonso in 1458, the kingdom again became divided between his brother John II of Aragon, who kept the island of Sicily, and his illegitimate son Ferdinand, who became King of Naples. In 1501, King Ferdinand II of Aragon, the son of John II, agreed to help Louis XII of France conquer Naples and Milan. After Frederick IV was forced to abdicate, the French took power, and Louis reigned as Louis III of Naples for three years. Negotiations to divide the region failed, and the French soon began unsuccessful attempts to force the Spanish out of the peninsula.
After the French lost the Battle of Garigliano (1503), they left the kingdom. Ferdinand II then re-united the two areas into one kingdom. From 1516, when Charles V, Holy Roman Emperor became the first King of Spain, both Naples and Sicily came under direct Spanish rule. In 1530 Charles V granted the islands of Malta and Gozo, which had been part of the Kingdom of Sicily, to the Knights Hospitaller (thereafter known as the Order of Malta). At the end of the War of the Spanish Succession, the Treaty of Utrecht in 1713 granted Sicily to the Duke of Savoy, until the Treaty of Rastatt in 1714 left Naples to the Emperor Charles VI. In the 1720 Treaty of The Hague, the Emperor and Savoy exchanged Sicily for Sardinia, thus reuniting Naples and Sicily.
The treaty of Casalanza restored Ferdinand IV of Bourbon to the throne of Naples and the island of Sicily (where the constitution of 1812 virtually had disempowered him) was returned to him. In 1816 he annulled the constitution and Sicily became fully reintegrated into the new state, which was now officially called the Regno delle Due Sicilie (Kingdom of Two Sicilies). Ferdinand IV became Ferdinand I.
A number of accomplishments under the administration of Kings Joseph and Joachim Murat, such as the Code Civil, the penal and commercial code, were kept (and extended to Sicily). In the mainland parts of the Kingdom, the power and influence of both nobility and clergy had been greatly reduced, though at the expense of law and order. Brigandage and the forceful occupation of lands were problems the restored Kingdom inherited from its predecessors.
The Vienna Congress had granted Austria the right to station troops in the kingdom, and Austria, as well as Russia and Prussia, insisted that no written constitution was to be granted to the kingdom. In October 1815, Joachim Murat landed in Calabria, in an attempt to regain his kingdom. The government responded to acts of collaboration or of terrorism with severe repression and by June 1816 Murat's attempt had failed and the situation was under government control. However, the Neapolitan administration had changed from conciliatory to reactionary policies. The French novelist Henri de Stendhal, who visited Naples in 1817, called the kingdom "an absurd monarchy in the style of Philip II".
As open political activity was suppressed, liberals organized themselves in secret societies, such as the Carbonari, an organization whose origins date back into the French period and which had been outlawed in 1816. In 1820 a revolution planned by Carbonari and their supporters, aimed at obtaining a written constitution (the Spanish constitution of 1812), did not work out as planned. Nevertheless, King Ferdinand felt compelled to grant the constitution sought by the liberals (July 13). That same month, a revolution broke out in Palermo, Sicily, but was quickly suppressed. Rebels from Naples occupied Benevento and Pontecorvo, two enclaves belonging to the Papal States. At the Congress of Troppau (Nov. 19th), the Holy Alliance ( Metternich being the driving force) decided to intervene. On February 23, 1821, in front of 50,000 Austria troops paraded outside his capital, King Ferdinand cancelled the constitution. An attempt at Neapolitan resistance to the Austrians by regular forces under General Guglielmo Pepe, as well as by irregular rebel forces (Carbonari), was smashed and on March 24, 1821 Austrian forces entered the city of Naples.
Political repression then only intensified. Lawlessness in the countryside was aggravated by the problem of administrative corruption. An coup attempted in 1828 and aimed at forcing the promulgation of a constitution was suppressed by Neapolitan troops (the Austrian troops had left the previous year). King Francis I (1825-1830) died after having visited Paris, where he witnessed the 1830 revolution. In 1829 he had created the Royal Order of Merit (Royal Order of Francis I. of the Two Sicilies). His successor Ferdinand II declared a political amnesty and undertook steps to stimulate the economy, including reduction of taxation. Eventually the city of Naples would be equipped with street lighting and in 1839 the railroad from Naples to Portici was put into operation, measures that were visible signs of progress. However, as to the railroad, the Church still objected to the construction of tunnels, because of their 'obscenity'.
In 1836 the Kingdom was struck by a cholera epidemic which killed 65,000 in Sicily alone. In the following years the Neapolitan countryside saw sporadic local insurrections. In the 1840s, clandestine political pamphlets circulated, evading censorship. Moreover, in September 1847 a uprising saw insurrectionists crossing from mainland Calabria over to Sicily before government forces were able to suppress them. On January 13, 1848, an open rebellion began in Palermo and demands were made for the reintroduction of the 1812 constitution. King Ferdinand appointed a liberal prime minister, broke off diplomatic relations with Austria and even declared war on the latter (April 7). Although revolutionaries who had risen in several mainland cities outside Naples shortly after the Sicilians approved of the new measures (April 1848), Sicily continued with her revolution. Faced with these differing reactions to his moves, King Ferdinand, using the Swiss Guard, took the initiative and ordered the suppression of the revolution in Naples (May 15) and by July the mainland was again under royal control and by September, also Messina. Palermo, the revolutionaries' capital and last stronghold, fell to the government some months later on 15 May 1849.
The Kingdom of Two Sicilies, in the course of 1848–1849, had been able to suppress the revolution and the attempt of Sicilian secession with their own forces, hired Swiss guards included. The war declared on Austria in April 1848, under pressure of public sentiment, had been an event on paper only.
In 1849 King Ferdinand II was 39 years old; he had begun as a reformer; the early death of his wife (1836), the frequency of political unrest, the extent and range of political expectations on the side of various groups that made up public opinion, had caused him to pursue a cautious, yet authoritarian policy aiming at the prevention of the occurrence of yet another rebellion. Over half of the delegates elected to parliament in the liberal atmosphere of 1848 were arrested or fled the country. The administration, in their treatment of political prisoners, in their observation of 'suspicious elements', violated the rights of the individual guaranteed by the constitution. Conditions were so bad that they caused international attention; in 1856 Britain and France demanded the release of the political prisoners. When this was rejected, both countries broke off diplomatic relations. The Kingdom pursued an economic policy of protectionism; the country's economy was mainly based on agriculture, the cities, especially Naples - with over 400,000 inhabitants Italy's largest - 'a center of consumption rather than of production' (Santore p. 163) and home to poverty most expressed by the masses of Lazzaroni, the poorest class.
After visiting Naples in 1850, Gladstone began to support Neapolitan opponents of the Bourbon rulers: his "support" consisted of a couple of letters that he sent from Naples to the Parliament in London, describing the "awful conditions" of the Kingdom of Southern Italy and claiming that "it is the negation of God erected to a system of government". Gladstone's letters provoked sensitive reactions in the whole of Europe and helped to cause its diplomatic isolation prior to the invasion and annexation of the Kingdom of the Two Sicilies by the Kingdom of Sardinia, with the following foundation of modern Italy. Administratively, Naples and Sicily remained separate units; in 1858 the Neapolitan Postal Service issued her first postage stamps; that of Sicily followed in 1859.
Until 1849, the political movement among the bourgeoisie, at times revolutionary, had been Neapolitan respectively Sicilian rather than Italian in its tendency; Sicily in 1848-1849 had striven for a higher degree of independence from Naples rather than for a unified Italy. As public sentiment for Italian unification was rather low in the Kingdom of the Two Sicilies, the country did not feature as an object of acquisition in the earlier plans of Piemont-Sardinia's prime minister Cavour. Only when Austria was defeated in 1859 and the unification of Northern Italy (except Venetia) was accomplished in 1860, did Giuseppe Garibaldi, at the head of his 1000 Redshirts, launch his invasion of Sicily, with the connivance of Cavour (Once in Sicily, many rallied to his colours); after a successful campaign in Sicily, he crossed over to the mainland and won the battle of the Volturno with half of his army being local volunteers. King Francis II (since 1859) withdrew to the fortified port of Gaeta, where he surrendered and abdicated in February 1861. At the encounter of Teano, Garibaldi met King Victor Emmanuel, transferring to him the conquered kingdom, the Two Sicilies were annexed into the Kingdom of Italy. What used to be the Kingdom of Two Sicilies became Italy's Mezzogiorno.
The Teatro Reale di San Carlo commissioned by the Bourbon King Charles VII of Naples who wanted to grant Naples a new and larger theatre to replace the old, dilapidated, and too-small Teatro San Bartolomeo of 1621. Which had served the city well, especially after Scarlatti had moved there in 1682 and had begun to create an important opera centre which existed well into the 1700s. Thus, the San Carlo was inaugurated on 4 November 1737, the king's name day, with the performance of Domenico Sarro's opera Achille in Sciro and much admired for its architecture the San Carlo was now the biggest opera house in the world.
On 13 February 1816 a fire broke out during a dress-rehearsal for a ballet performance and quickly spread to destroy a part of building. On the orders of King Ferdinand I, who used the services of Antonio Niccolini, to rebuild the opera house within ten months as a traditional horseshoe-shaped auditorium with 1,444 seats, and a proscenium, 33.5m wide and 30m high. The stage was 34.5m deep. Niccolini embellished in the inner of the bas-relief depicting "Time and the Hour". Stendhal attended the second night of the inauguration and wrote: "There is nothing in all Europe, I won't say comparable to this theatre, but which gives the slightest idea of what it is like..., it dazzles the eyes, it enraptures the soul...".
From 1815 to 1822, Gioachino Rossini was the house composer and artistic director of the royal opera houses, including the San Carlo. During this period he wrote ten operas which were Elisabetta, regina d'Inghilterra (1815), La gazzetta, Otello, ossia il Moro di Venezia (1816), Armida (1817), Mosè in Egitto, Ricciardo e Zoraide (1818), Ermione, Bianca e Falliero, Eduardo e Cristina, La donna del lago (1819), Maometto II (1820), and Zelmira (1822), many premiered at the San Carlo. An offer in 1822 from Domenico Barbaja, the impresario of the San Carlo, which followed the composer's ninth opera, led to Gaetano Donizetti's move to Naples and his residency there which lasted until the production of Caterina Cornaro in January 1844. In all, Naples presented 51 of Donizetti's operas. Also Vincenzo Bellini's first professionally staged opera had its first performance at the Teatro di San Carlo in Naples on 30 May 1826.
The kingdom had a large population, its capital Naples being the biggest city in Italy, at least three times as large as any other contemporary Italian state. At its peak, the kingdom had a military 100,000 soldiers strong, and a large bureaucracy. Naples was the largest city in the kingdom and the third largest city in Europe. The second largest city, Palermo, was the third largest in Italy. In the 1800s, the kingdom experienced large population growth, rising from approximately five to seven million. It held approximately 36% of Italy's population around 1850.
Because the kingdom did not establish a statistical department until after 1848, most population statistics prior to that year are estimates and censuses that were thought by contemporaries to be inaccurate.
This section needs additional citations for verification. (January 2020)
A major problem in the Kingdom was the distribution of land property - most of it concentrated in the hands of a few families, the Landed Oligarchy. The villages housed a large Rural Proletariat, desperately poor and dependent on the landlords for work. The Kingdom's few cities had little industry, thus not providing the outlet excess rural population found in northern Italy, France or Germany. The figures above show that the population of the countryside rose at a faster rate than that of the city of Naples herself, a rather odd phenomenon in a time when much of Europe experienced the Industrial Revolution.
As registered in the 1827 census, for the Neapolitan (continental) part of the kingdom, 1,475,314 of the male population were listed as Husbandmen which traditionally consisted of three classes the Borgesi (or yeomanry), the Inquilani (or small-farmers) and the Contadini (or peasantry), along with 65,225 listed as shepherds. Wheat, wine, olive oil and cotton were the chief products with an annual production, as recorded in 1844, of 67 mio. liters of olive oil greatly produced in Apulia and Calabria and loaded for export at Gallipoli along with 191 mio. liters of wine for the principal part home consumed. On the island of Sicily, in 1839, due to less arable lands, the output was much smaller than on the mainland yet c. 115,000 acres of vineyards and c. 260,000 acres of orchards, mainly fig, orange and citrus, were best cultivated.
Industry was the largest source of income if compared with the other preunitarian states. One of the most important industrial complexes in the kingdom was the shipyard of Castellammare di Stabia, which employed 1800 workers. The engineering factory of Pietrarsa was the largest industrial plant in the Italian peninsula, producing tools, cannons, rails, locomotives. The complex also included a school for train drivers, and naval engineers and, thanks to this school, the kingdom was able to replace the English personnel who had been necessary until then. The first steamboat with screw propulsion known in the Mediterranean Sea was the "Giglio delle Onde", with mail delivery and passenger transport purposes after 1847.
In Calabria, the Fonderia Ferdinandea was a large foundry where cast iron was produced. The Reali ferriere ed Officine di Mongiana was an iron foundry and weapons factory. Founded in 1770, it employed 1600 workers in 1860 and closed in 1880. In Sicily (near Catania and Agrigento), sulfur was mined to make gunpowder. The Sicilian mines were able to satisfy most of the global demand for sulfur. Silk cloth production was focused in San Leucio (near Caserta). The region of Basilicata also had several mills in Potenza and San Chirico Raparo, where cotton, wool and silk were processed. Food processing was widespread, especially near Naples (Torre Annunziata and Gragnano).
The kingdom maintained a large sulfur mining industry. In the increasingly industrialized Great Britain, with the repeal of tariffs on salt in 1824, demand for sulfur from Sicily surged. The growing British control and exploitation of the mining, refining, and transportation of sulfur, combined with the failure of this lucrative export to transform Sicily's backward and impoverished economy, led to the 'Sulfur Crisis' of 1840. This was precipitated when King Ferdinand II granted a monopoly of the sulfur industry to a French company, in violation of an 1816 trade agreement with Britain. A peaceful solution was eventually negotiated by France.
With all of its major cities boasting successful ports, transport and trade in the Kingdom of the Two Sicilies was most efficiently conducted by sea. The kingdom possessed the largest merchant fleet in the Mediterranean. Urban road conditions were to the best European standards; by 1839, the main streets of Naples were gas-lit. Efforts were made to tackle the tough mountainous terrain; Ferdinand II built the cliff-top road along the Sorrentine peninsula. Road conditions in the interior and hinterland areas of the kingdom made internal trade difficult. The first railways and iron-suspension bridges in Italy were developed in the south, as was the first overland electric telegraph cable.
Technological and scientific achievements
The kingdom achieved several scientific and technological accomplishments, such as the first steamboat in the Mediterrean Sea (1818), built in the shipyard of Stanislao Filosa al ponte di Vigliena, near Naples, and the first railway in the Italian peninsula (1839), which connected Naples to Portici. However, until the Italian unification, the railway development was highly limited. In the year 1859, the kingdom had only 99 kilometers of rail, compared to the 850 kilometers of Piedmont. Southern landscape was mainly mountainous so making the process of building railways was quite difficult, as building railway tunnels was much harder at the time. Other achievements included the first volcano observatory in the world, l'Osservatorio Vesuviano (1841). The rails for the first Italian railways were built in Mongiana as well. All the rails of the old railways that went from the south to as far as Bologna were built in Mongiana. 
Naples was home to a University and, established by Matteo Ripa in 1732, the oldest school in Europe teaching Sinology and Oriental studies while a further two universities operated in Sicily. Despite these institutions of higher learning the kingdom had no obligations for school attendance nor a recognizable school system. Clerics could inspect schools and had veto power over appointments of teachers, who were mostly part of the clergy anyhow. The Literacy rate was just 14.4% in 1861.
The peninsula was divided into fifteen departments and Sicily was divided into seven departments. The island itself had a special administrative status, with its base at Palermo. In 1860, when the Two Sicilies were conquered by the Kingdom of Sardinia, the departments became provinces of Italy, according to the Rattazzi law.
- Province of Naples - Naples
- Terra di Lavoro - Capua / Caserta from 1818
- Principato Citra - Salerno
- Principato Ultra - Avellino
- Basilicata - Potenza
- Capitanata - originally San Severo, then Foggia
- Terra di Bari - Bari
- Terra d'Otranto - Lecce
- Calabria Citra - Cosenza
- Calabria Ultra I - Reggio
- Calabria Ultra II - Catanzaro
- Contado di Molise - Campobasso
- Abruzzo Citra - Chieti
- Abruzzo Ultra I - Teramo
- Abruzzo Ultra II - Aquila
- Province of Caltanissetta - Caltanissetta
- Province of Catania - Catania
- Province of Girgenti - Girgenti
- Province of Messina - Messina
- Province of Noto - Noto
- Province of Palermo - Palermo
- Province of Trapani - Trapani
Kings of the Two Sicilies
In 1860–61 with influence from Great Britain and Gladstone's propaganda, the kingdom was absorbed into the Kingdom of Sardinia, and the title dropped. It is still claimed by the head of the House of Bourbon-Two Sicilies.
Titles of King of the Two Sicilies
Flags of the Kingdom of the Two Sicilies
- 1816–1848; 1849–1860 flag
- 1848–1849 flag
- 1860–1861 flag
- Framed antique flag of the Kingdom of the Two Sicilies (c. 1830s) discovered in Palermo.
Orders of knighthood
- Order of St. Januarius
- Sacred Military Constantinian Order of Saint George
- Order of Saint George and Reunion
- Order of Saint Ferdinand and Merit
- Royal Order of Francis I
- Dictatorship of Garibaldi
- List of historic states of Italy
- List of monarchs of the Kingdom of the Two Sicilies
- Southern Italy
- Southern Italy autonomist movements
- Two Sicilies national football team
- Army of the Two Sicilies
- Real Marina (Kingdom of the Two Sicilies)
- Swinburne, Henry (1790). Travels in the Two Sicilies (1790). British Library.
- De Sangro, Michele (2003). I Borboni nel Regno delle Due Sicilie (in Italian). Lecce: Edizioni Caponi.
- Nicola Zitara. "La legge di Archimede: L'accumulazione selvaggia nell'Italia unificata e la nascita del colonialismo interno" (PDF) (in Italian). Eleaml-Fora!.[permanent dead link]
- "Sicilian History". Dieli.net. 7 October 2007.
- Oldfield, Paul (2017). "Alexander of Telese's Encomium of Capua and the Formation of the Kingdom of Sicily" (PDF). History. 102 (350): 183–200. doi:10.1111/1468-229X.12374. Archived (PDF) from the original on 27 April 2019.
- Oldfield, Paul (2015). "Italo-Norman Empire". The Encyclopedia of Empire: A-C. The Encyclopedia of Empire. John Wiley & Sons. pp. 1–3. doi:10.1002/9781118455074.wbeoe004. ISBN 978-1-118-45507-4.
- "Kingdom of the Two Sicilies | historical kingdom, Italy". Encyclopedia Britannica. Retrieved 31 December 2019.
- Fleck, Cathleen A (5 July 2017). The Clement Bible at the Medieval Courts of Naples and Avignon: "A Story of Papal Power, Royal Prestige, and Patronage ". Routledge. p. 3. ISBN 978-1-351-54553-2.
- Shneidman, J. Lee (1960). "Aragon and the War of the Sicilian Vespers". The Historian. 22 (3): 250–263. doi:10.1111/j.1540-6563.1960.tb01657.x. ISSN 0018-2370. JSTOR 24437629.
- Kohn, George Childs (31 October 2013). Dictionary of Wars. Routledge. p. 449. ISBN 978-1-135-95494-9.
- Kleinhenz, Christopher (2 August 2004). Medieval Italy: An Encyclopedia. Routledge. p. 1103. ISBN 978-1-135-94880-1.
- Sakellariou, Eleni (9 December 2011). Southern Italy in the Late Middle Ages: Demographic, Institutional and Economic Change in the Kingdom of Naples, c.1440-c.1530. BRILL. p. 63. ISBN 978-90-04-22405-6.
- Kleinhenz, Christopher (2 August 2004). Medieval Italy: An Encyclopedia. Routledge. p. 847. ISBN 978-1-135-94879-5.
- O'Callaghan, Joseph F. (12 November 2013). A History of Medieval Spain. Cornell University Press. ISBN 978-0-8014-6871-1.
- Hooper, John (29 January 2015). The Italians. Penguin. p. 19. ISBN 978-0-698-18364-3.
- Davies, Norman (5 January 2012). Vanished Kingdoms: The Rise and Fall of States and Nations. Penguin. p. 210. ISBN 978-1-101-54534-8.
- Kellogg, Day Otis; Smith, William Robertson (1902). The Encyclopaedia Britannica: latest edition. A dictionary of arts, sciences and general literature. Werner. pp. 478.
- Tarver, H. Micheal; Slape, Emily (25 July 2016). The Spanish Empire: A Historical Encyclopedia [2 volumes]: A Historical Encyclopedia. ABC-CLIO. p. 151. ISBN 978-1-61069-422-3.
- "Italy - The age of Charles V". Encyclopedia Britannica. Retrieved 31 December 2019.
- Badger, George Percy (1838). Description of Malta and Gozo. M. Weiss. pp. 19–20.
- Memoirs of the affairs of Europe from the Peace of Utrecht. Murray. 1824. p. 426.
- Dadson, Trevor J. (2 December 2017). Britain, Spain and the Treaty of Utrecht 1713-2013. Routledge. ISBN 978-1-351-19133-3.
- Tucker, Spencer C. (22 September 2015). Wars That Changed History: 50 of the World's Greatest Conflicts: 50 of the World's Greatest Conflicts. ABC-CLIO. p. 270. ISBN 978-1-61069-786-6.
- Williams, Henry Smith (1907). Italy. The Times. p. 670.
- Blackmore, David S. T. (10 January 2014). Warfare on the Mediterranean in the Age of Sail: A History, 1571-1866. McFarland. p. 121. ISBN 978-0-7864-5784-7.
- Lynn 2005, p. 277
- Beauvert 1985, p. 44
- Gubler 2012, p. 55
- Black 1982, p. 1
- Weinstock 1971, pp. 30—34
- Macgregor, John (1850). Commercial Statistics: A Digest of the Productive Resources, Commercial Legislation, Customs Tariffs, of All Nations. Including All British Commercial Treaties with Foreign States. Whittaker and Company. p. 18.
- Partington, Charles F. (1836). The british cyclopedia of literature, history, geography, law, and politics. 2. p. 553.
- Berkeley, G. F.-H.; Berkeley, George Fitz-Hardinge; Berkeley, Joan (1968). Italy in the Making 1815 to 1846. Cambridge University Press. p. 37. ISBN 978-0-521-07427-8.
- Commercial Statistics: A Digest of the Productive Resources, Commercial Legislation, Customs Tariffs ... of All Nations ... C. Knight and Company. 1844. p. 18.
- The Popular Encyclopedia: Or, Conversations Lexicon. Blackie. 1862. p. 246.
- Russell, John (1870). Selections from Speeches of Earl Russell 1817 to 1841 and from Despatches 1859 to 1865: With Introductions. In 2 Volumes. Longmans, Green, and Company. p. 223.
- Mezzogiorno d'Europa. 1983. p. 473.
- Ziblatt, Daniel (21 January 2008). Structuring the State: The Formation of Italy and Germany and the Puzzle of Federalism. Princeton University Press. p. 77. ISBN 978-1-4008-2724-4.
- Hearder, Harry (22 July 2014). Italy in the Age of the Risorgimento 1790 - 1870. Routledge. pp. 125–6. ISBN 978-1-317-87206-1.
- Astarita, Tommaso (17 July 2006). Between Salt Water and Holy Water: A History of Southern Italy. W. W. Norton & Company. ISBN 978-0-393-25432-7.
kingdom of the two sicilies population.
- Toniolo, Gianni (14 October 2014). An Economic History of Liberal Italy (Routledge Revivals): 1850-1918. Routledge. p. 18. ISBN 978-1-317-56953-4.
- House Documents. Washington, D.C.: U.S. Government Printing Office. 1870. p. 19.
- MacGregor, John (1844). Commercial Statistics Vol.I. London.
- Thomson, D. W. (April 1995). "Prelude to the Sulphur War of 1840: The Neapolitan Perspective". European History Quarterly. 25 (2): 163–180. doi:10.1177/026569149502500201. S2CID 145807900.
- Riall, Lucy (1998). Sicily and the Unification of Italy: Liberal Policy and Local Power, 1859–1866. Oxford University Press. ISBN 9780191542619. Retrieved 7 February 2013.
- The Economist. Economist Newspaper Limited. 1975.
- Sondhaus, Lawrence (12 October 2012). Naval Warfare, 1815-1914. Routledge. p. 20. ISBN 978-1-134-60994-9.
- "La Dolce Vita? Italy By Rail, 1839-1914 | History Today". History Today. Retrieved 29 December 2019.
- Duggan, Christopher (1994). A Concise History of Italy. Cambridge University Press. pp. 152. ISBN 978-0-521-40848-6.
- De Lucia, Maddalena; Ottaiano, Mena; Limoncelli, Bianca; Parlato, Luigi; Scala, Omar; Siviglia, Vittoria (2010). "The Museum of Vesuvius Observatory and its public. Years 2005 - 2008". EGUGA: 2942. Bibcode:2010EGUGA..12.2942D.
- Klemetti, Erik (7 June 2009). "Volcano Profile: Mt. Vesuvius". Wired. ISSN 1059-1028. Retrieved 29 December 2019.
- Goodwin, John (1842). "Progress of the Two Sicilies Under the Spanish Bourbons, from the Year 1734-35 to 1840". Journal of the Statistical Society of London. 5 (1): 47–73. doi:10.2307/2337950. ISSN 0959-5341. JSTOR 2337950.
- Pompilio Petitti (1851). Repertorio amministrativo ossia collezione di leggi, decreti, reali rescritti ecc. sull'amministrazione civile del Regno delle Due Sicilie, vol. 1 (in Italian). Napoli: Stabilimento Migliaccio. p. 1.
- Pompilio Petitti (1851). Repertorio amministrativo ossia collezione di leggi, decreti, reali rescritti ecc. sull'amministrazione civile del Regno delle Due Sicilie, vol. 1 (in Italian). Napoli: Stabilimento Migliaccio. p. 4.
- States, United (1931). Treaties and Other International Acts of the United States of America: Documents 173-200: 1855-1858. U.S. Government Printing Office. p. 250.
- Alio, Jacqueline. Sicilian Studies: A Guide and Syllabus for Educators (2018), 250 pp.
- Eckaus, Richard S. "The North-South differential in Italian economic development." Journal of Economic History (1961) 21#3 pp: 285–317.
- Finley, M. I., Denis Mack Smith and Christopher Duggan, A History of Sicily (1987) abridged one-volume version of 3-volume set of 1969)
- Imbruglia, Girolamo, ed. Naples in the eighteenth century: The birth and death of a nation state (Cambridge University Press, 2000)
- Mendola, Louis. The Kingdom of the Two Sicilies 1734-1861 (2019)
- Petrusewicz, Marta. "Before the Southern Question: 'Native' Ideas on Backwardness and Remedies in the Kingdom of Two Sicilies, 1815–1849." in Italy's 'Southern Question' (Oxford: Berg, 1998) pp: 27–50.
- Pinto, Carmine. "The 1860 disciplined Revolution. The Collapse of the Kingdom of the Two Sicilies." Contemporanea (2013) 16#1 pp: 39–68.
- Riall, Lucy. Sicily and the Unification of Italy: Liberal Policy & Local Power, 1859–1866 (1998), 252pp
- Zamagni, Vera. The economic history of Italy 1860–1990 (Oxford University Press, 1993)