The Fitzalan Chapel is the chancel of the church of St Nicholas in the western grounds of Arundel Castle. The church of St Nicholas is one of the very few church buildings that is divided into two worship areas, a Roman Catholic area (the chancel) and an Anglican area (the nave and transepts). The chancel of the Fitzalan Chapel, is used as the private mausoleum of the Dukes of Norfolk. It is a Grade I listed building.