Erbreichsplan is a German word meaning "plan for a hereditary empire". It refers to the proposal of Henry VI, Holy Roman Emperor (1191–1197), to abolish imperial election and make the Holy Roman Empire hereditary within his family, the Staufer. This would effectively have combined the Empire and its three kingdoms—Germany, Italy and Burgundy—with the hereditary kingdom of Sicily, which belonged to Henry and his heirs in right of his wife, the heiress Constance. Since Sicily was a papal fief, this plan was strongly opposed by the Papacy. It also failed to generate sufficient support among the imperial princes.