There is a church beside Pagham Harbour called St Wilfrids which actually includes the chancel of the original Norman building, the remainder having been moved to Selsey. The font is Victorian, and thought to have come from the demolished church of St Martin in Chichester, while earthworks outside the church are all that remain of what is thought to have been an 11th century castle.
Map of the area.
Ferry Pool, Pagham Harbour. Photo by Simon Carey, via Wikimedia Commons