Claim: Nezamysl was one of seven mythical princes whose names were recorded in Cosmas chronicle and then transmitted into historical works, but they are not connected to the Ducal Rotunda of the Virgin Mary dating back to the 11th or 12th century.
Evidence: Nezamysl was the first of the seven Bohemian mythical princes between the (also mythical) founder of the Přemyslid dynasty Přemysl the Ploughman and the first historical prince Bořivoj. The names of the princes were first recorded in Cosmas chronicle and then transmitted into most historical works up into the 19th century, including František Palacký's The History of the Czech Nation in Bohemia and Moravia (1836). One theory connects the number of princes to the frescoes on the "Ducal Rotunda" of the Virgin Mary and St Catherine in Znojmo, Moravia, which date back to the late 11th or early 12th century. However, Anežka Merhautová suggested that the frescoes depict all the members of the Přemyslid dynasty including the Moravian junior princes at the time when it was painted, rather than a Přemyslid pedigree.