Muscovy_Crown
The so-called Muscovy Crown (Polish: Korona moskiewska) was a part of the Polish Crown Jewels. It was made in about 1610 in anticipation of Prince Władysław Vasa's coronation as Tsar of Russia, which was also known as Muscovy.[1] Due to his father's opposition and a popular uprising in Russia, he never actually took the Russian throne, despite being elected by the Seven Boyars. Nevertheless, until 1634 he used the title of Grand Duke of Muscovy.