Royalty, Queen of Hungary, Holy Roman Empress and Queen of Sicily. Born the daughter of Alfonso II of Aragon and his first wife Sancha of Castile. In 1198 she was married to Emmerich (Imre) of Hungary and Croatia and gave birth to her only child with him a year later. Ladislas III (László III) succeeded his father in 1204, but died six months after being crowned. Soon after Emmerich's death Friedrichs engagement to her sister Sancha was dissolved and the negotiations for a marriage between Constance and Friedrich began. Sancha later married Raimond VII of Toulouse and gave birth to a daughter. They were divorced in 1241 and she became a nun by the name Dulcia. In 1208 Constance and Friedrich were married by proxy and a year later in person in Messina. Her dowry consisted of 500 spanish knights with which Friedrich intended to strengthen his reign on the mainland. But while preparing for the campaign in Messina they were seized by an epidemic. Most of them died there within two months of their arrival, including Constances brother Alfons of Provence. The character of Friedrich who had grown up in the company of soldiers changed under her influence and he showed a sense for a cultivated lifestyle and courtly manners that befitted his rank. She was perhaps the first person he showed unconditional trust for since the death of his mother. Two years after the wedding she gave birth to a son who was named Heinrich after his grandfather. Before Friedrich traveled to Germany in 1212 his son was crowned King of Sicily and he appointed Constance as his regent during his absence. In 1216 she and her son followed him to Germany where Heinrich was created Duke of Swabia. In contrast with his later marriages he spent much time with her. She was also his only wife that was crowned empress and found her last resting place beside him at the Cathedral of Palermo. She died two years after being crowned empress by Pope Honorius II, and Friedrich laid his crown into her sarcophagus. The inscription on it reads: 'I was Sicily's queen, Constantia, your wedded empress, now I rest here, Friedrich, yours.'