In 1065 the Normans conquered the region and attached Pontecorvo to the Norman county of Gaeta, but the abbot of Monte Cassino purchased it in 1105, and maintained a precarious hold on it for over four centuries. The first communal statute, among the earliest in the Kingdom of Naples, was granted in 1190, signalling a new era of civic self-confidence in a period in which Pontecorvo was briefly conquered and ruled by Roger II of Sicily, was claimed by the papacy, and was sacked by Charles of Anjou. During the Western Schism, Pontecorvo allied with antipope Clement VII in opposition to the local power of Monte Cassino.