Complex sentence: After Caedwalla conquered the South Saxons c.685, the area became part of the Diocese of Wessex, with its seat in Winchester, however the bishopric of Sussex was re-established c.705, and Wilfrid's monastery was taken over as the episcopal seat.
Split into simpler sentences: After Caedwalla conquered the South Saxons c.685, the area became part of the Diocese of Wessex, with its seat in Winchester. However, the bishopric of Sussex was re-established in about 705, and Wilfrid's monastery was taken over as the episcopal seat.