The round parish church, dedicated to St John the Baptist, is a Grade II* listed building dating from around 1335. It is one of only four round churches now surviving and was built by the Knights of St John. In March 2013 the church was granted £5,000 by the National Churches Trust towards the repair of the gutters. A total of £42,000 has now been raised for a restoration project at the church, which was started by supporters two years ago, with a fund-raising target of £100,000. Some restoration took place in the 1850s, but the original design and composition of the rotunda that forms the nave remains, as do many of the earlier fittings. In 1836, William Wallen published The History and Antiquities of the Round Church at Little Maplestead, Essex.