The area was devastated by the Saracens in 813 and 847; in 1004 it was occupied by Henry II of Germany; the Norman Roger II of Sicily took it in 1130 granting the island to the Norman Aldoyn de Candida created Count d’Ischia; the island was raided by the Pisans in 1135 and 1137 and subsequently fell under the Suebi and then Angevin rule. After the Sicilian Vespers in 1282, the island rebelled, recognizing Peter III of Aragon, but was retaken by the Angevins the following year. It was conquered in 1284 by the forces of Aragon and Charles II of Anjou was unable to successfully retake it until 1299.
As a consequence of the island's last eruption, the population fled to Baia where they remained for 4 years. In 1320 Robert of Anjou and his wife Sancia visited the island and were hosted by Cesare Sterlich, who had been sent by Charles II from the Holy See to govern the island in 1306 and was by this time nearly 100 years of age.
Ischia suffered greatly in the struggles between the Angevin and Durazzo dynasties. It was taken by Carlo Durazzo in 1382, retaken by Louis II of Anjou in 1385 and captured yet again by Ladislus of Naples in 1386; it was sacked by the fleet of the Antipope John XXIII under the command of Gaspare Cossa in 1410 only to be retaken by Ladislaus the following year. In 1422 Joan II gave the island to her adoptive son Alfonso V of Aragon, though, when he fell into disgrace, she retook it with the help of Genoa in 1424. In 1438 Alfonso reoccupied the castle, kicking out all the men and proclaiming it an Aragonese colony, marrying to his garrison the wives and daughters of the expelled. He set about building a bridge linking the castle to the rest of the island and he carved out a large gallery, both of which are still to be seen today. In 1442, he gave the island to one of his favorites, Lucretia d'Alagno, who in turn entrusted the island's governance to her brother-in-law, Giovanni Torella. Upon the death of Alfonso in 1458, they
