The Parish Church of the Holy Trinity

The Parish Church of the Holy Trinity is a Grade I listed building located on the north side of Bosham High Street. It features a chancel with a north vestry, a nave with aisles, a south porch, and a west tower topped with a broached shingle spire. The church is constructed from Mixon stone, Top Chalk, sarsen stone, and Quarr stone rubble, with a tiled roof.

This church is one of the most renowned medieval churches in Sussex and may be situated on the site of a Roman basilica. The main part of the chancel is of Saxon origin, but it was extended to the east in the late 12th century, with the vestry added around 1200. The tower is also of Saxon construction, except for the top storey, which was added in the 15th century. The nave dates from the 13th century, while the south porch is from the 14th century.

Notable interior features include a double trefoil-headed piscina and an octagonal font from around 1200, which has four corner shafts. There is a recess in the south aisle with a 15th-century flat cinquefoil-headed arch adorned with carved heads at the ends of the cusps. An early 14th-century effigy can be found on the west side of the chancel. It is said that one of King Canute's daughters is buried here.