When the abbey was rebuilt by the Normans, the site was moved. The site of the original priory church was redeveloped in stone as the parish church. As such it is now the oldest building on the island still with a roof on. Remains of the Saxon church exist as the chancel wall and arch. A Norman apse (subsequently replaced in the 13th century) led eastwards from the chancel. The nave was extended in the 12th century with a northern arcade, and in the following century with a southern arcade.