Stephen V was King of Hungary and Croatia between 1270 and 1272, and Duke of Styria from 1258 to 1260. He was the oldest son of King Béla IV and Maria Laskarina. King Béla had his son crowned king at the age of six and appointed him Duke of Slavonia. Still a child, Stephen married Elizabeth, a daughter of a chieftain of the Cumans whom his father settled in the Great Hungarian Plain.
Stephen's royal seal
Stephen's father, King Béla IV of Hungary (from the Illuminated Chronicle)
Seal of Stephen's wife, Elizabeth the Cuman
Baba Vida, the medieval fortress at Vidin in Bulgaria: Stephen captured it in 1261
The King of Hungary was the ruling head of state of the Kingdom of Hungary from 1000 to 1918. The style of title "Apostolic King of Hungary" was endorsed by Pope Clement XIII in 1758 and used afterwards by all monarchs of Hungary.
Crown Jewels of Hungary
The coronation of Leopold II at St. Martin's Cathedral in 1790, in Pozsony, site of Hungarian coronations between 1563 and 1830