[1] The church dates from the early Norman era, being built in 1120 as the chapel to the adjoining Walmer Manor (now in ruins).

The original Norman entrance door and chancel arch survive, along with two windows on the south side.

The south doorway is early Norman, with large shafts and capitals in a scalloped style.

[2][3] The Duke of Wellington worshipped here whilst staying at Walmer Castle as Lord Warden of the Cinque Ports.

A large amount of 19th century tablets are also present in the nave, and a monument to Sir Henry Harvey (died 1810) is installed in the centre of the south wall.