[1][3] At this time the church consisted of a nave with north and south aisles, a tower and a chancel.

[1] In 1560 a group of Flemish Protestants from the Spanish Netherlands came to live in Sandwich, and St Peter's became their church.

In the 1860s the west end was restored after it had been damaged in a storm, the roofs were retiled, the choir stalls were re-arranged, the box pews were replaced by bench seating, and the pulpit was moved from its position against the north wall to the southeast corner of the nave.

[1][3] The church is constructed in a mixture of materials, including pebbles, stone rubble, and brick.

Its plan consists of a nave, a central tower, a chancel, and a north aisle which stretches for almost the whole length of the church.

The upper two stages, built after the collapse of 1661, contain round-headed windows and bell openings, and clock faces.

Protruding from the chancel is the south vestry, with a curved Dutch gable dating from the middle of the 16th century.

It incorporates pipes taken from an earlier organ that was built in about 1880 by Charles H. Hobday, and was installed in the north aisle in 1895.

[3] The garden contains a two-light 14th-century window which was removed from the former St Thomas' Hospital, and erected on this site in 1923.

[8] The care of the church is supported by a group known as the Friends of St Peter's.

[11] The ancient custom of ringing the curfew bell from the church at 8pm daily still continues.