Simeon I of Bulgaria
In 912 he was kidnapped in the Adriatic by a Serb prince of Zachlumia by the name of Mihailo Višević while returning with the Doge's son from an official visit to Constantinople. Bulgaria was at war with Byzantium, the sovereign of Venice, so the coastal prince, who was a Bulgarian ally, dispatched him to Emperor Simeon I of Bulgaria, hoping he would push off Petar Gojniković's domination in the area.