Baubau is the principal town on Buton Island, the former capital of the Sultan of Wolio, who ruled Buton and the nearby islands of Muna, Kabaena, Wowini and Tukang Besi. The people conducted trade and communicated with both China and the Majapahit Kingdom, on the island of Java. Interestingly enough, the first ruler who governed this region was a queen, and the last was a king.