 After this, Emperor Justinian I built a wall at the entrance of the peninsula, but it is not until the 10th century that a sizeable settlement—described as a township ("polichnion") and later as a fortress ("kastron")—re-appears in the peninsula and that the bishopric is mentioned again, as a suffragan of Thessalonica.The area prospered due to its fertility, and both Thessalonians as well as the monks of the growing monastic community at nearby Mount Athos had estates there.In the winter of 1307/08, the peninsula and the city were seized and held by the Catalan Company during their move from Thrace to southern Greece.