The Byzantine Emperor Constans II decided to move from the capital Constantinople to Syracuse in Sicily in 663, the following year he launched an assault from Sicily against the Lombard Duchy of Benevento, which then occupied most of Southern Italy. The rumours that the capital of the empire was to be moved to Syracuse, along with small raids probably cost Constans his life as he was assassinated in 668. His son Constantine IV succeeded him, a brief usurpation in Sicily by Mizizios being quickly suppressed by the new emperor.