Henry's early death left his 3-year-old son, Frederick, as king of Sicily. Henry VI's widow, Constance of Sicily, ruled over Sicily for her young son before he reached the age of majority. She was as eager to remove German power from the kingdom of Sicily as was Innocent III. Before her death in 1198, she named Innocent as guardian of the young Frederick until he reached his maturity. In exchange, Innocent was also able to recover papal rights in Sicily that had been surrendered decades earlier to King William I of Sicily by Pope Adrian IV. The Pope invested the young Frederick II as King of Sicily in November 1198. He also later induced Frederick II to marry Constance of Aragon, the widow of King Emeric of Hungary, in 1209.