Ladislaus III
Emeric cooperated with the Holy See against the Bosnian Church, which the Catholic Church considered to be heretics. Taking advantage of a civil war, Emeric expanded his suzerainty over Serbia. He failed to prevent the Republic of Venice, which was assisted by crusaders of the Fourth Crusade, from seizing Zadar in 1202. He also could not impede the rise of Bulgaria along the southern frontiers of his kingdom. Emeric was the first Hungarian monarch to use the "Árpád stripes" as his personal coat of arms and to adopt the title of King of Serbia. Before his death, Emeric had his four-year-old son, Ladislaus III, crowned king.