The crown on top of the shield, and thus upon the shielded lion, according to the Coat of Arms of the Republic of Bulgaria Act, is supposed to be not that of the last Bulgarian monarchy (1879–1946), but that of the Second Bulgarian Empire (1185–1396). This empire was established by the brothers Peter and Asen, after it was freed from Byzantine control in the end of the 12th century, and it was subjugated by the Ottomans in the very end of the 14th century. In fact it significantly differs from the crowns known from medieval portraits such as these from the Tetraevangelia of Tsar Ivan Alexander (1331–1371).