Some say it was a watch tower to give early warning of invaders coming up the River Arun, others that it was a sort of safe haven for parishioners.
The impression is reinforced by the curious pair of slots on either side of the ornately-carved door, which look as though they were intended to support the ends of a drawbridge. Unfortunately, there are no holes for the chains that would have been necessary to haul it up, so they must be ornamental.
The tower was added to the original Saxon church in about 1180, when Henry II was busy enlarging Arundel Castle so it is possible it might have had some military function. Today, it is the extraordinary ornament that attracts attention.

On the first floor, the lancet windows are also framed in thick zigzag mouldings that are almost too big to get round the top comfortably.

The windows are tall, plain lancets, and the arches have simple roll mouldings that are models of elegance compared with the exuberant Norman carving on the tower. It is amazing how radically tastes had changed in just 50 years.
