"To the Door of the Sun (Alle porte del sole)" is a 1975 hit single by Al Martino and the title track of his LP. It is the English version of an Italian-language song by Gigliola Cinquetti, "Alle porte del sole" (pronounced [alle ˈpɔrte del ˈsoːle]), which was released in 1973. Cinquetti had later recorded an English rendition of it, different from Martino's, which was released as a single by CBS Records in August 1974 with her original Italian version on the B-side; it reached number one in Argentina and number six in South Africa.^[1] Cinquetti also recorded French- and Spanish-language versions of the song, respectively titled "Dernière histoire, premier amour" and "A las puertas del cielo".

In 1974, Katri Helena covered the song in Finnish under the title "Vasten auringon siltaa".^[2] A cover of this version was in turn recorded by Erin Anttila and released as a single in 2012, peaking at number 15 in the Finnish charts.^[3]

In early 1975, "To the Door of the Sun" reached number 17 on the U.S. Billboard Hot 100. It spent four months on the chart, equaling the chart run length of Martino's greatest hit, "I Love You Because" (#3, 1963).

"To the Door of the Sun" was a bigger Adult Contemporary hit, reaching number seven on the AC charts of both the United States and Canada. The song also charted in Australia. It became Martino's biggest hit of the 1970s.^{[citation needed]}