By the first half of the eleventh century, Lombard Calabria became a feudal dukedom of the Normans, with Cosenza as capital. The town soon rebelled against the rule of Roger Guiscard and was only recaptured after a long siege. Subsequently, under the Hohenstaufen rule, the town became the seat of the Court of Calabria ("Curia Generale"). The Emperor Frederick II had a particular interest in the town: he promoted construction and economic activities, organising an important annual fair.