Patriarchal cross

The Byzant christianization came to the Morava empire in the year 863, provided at the request of Prince Rastic sent Byzantine Emperor Michael III. The symbol, often referred to as the patriarchal cross, appeared in the Byzantine Empire in large numbers in the 10th century. For a long time, it was thought to have been given to Saint Stephen by the pope as the symbol of the apostolic Kingdom of Hungary. The two-barred cross is one of the main elements in the coats of arms of the Kingdom of Hungary since 1190. It appeared during the reign of King Béla III, who was raised in the Byzantine court. Béla was the son of Russian princess Eufrosina Mstislavovna. The cross appears floating in the coat of arms and on the coins from this era. In medieval Kingdom of Hungary was extended Byzantine Cyril-Methodian and western Latin church was expanded later.

The current coat of arms of Slovakia stems directly from the Cyril-Methodian tradition of the 9th century. The two-barred cross in the Hungarian coat of arms comes from the same source of Byzantine (Eastern Roman) Empire in the 12th century. Unlike the ordinary Christian cross, the symbolism and meaning of the double cross is not well understood.