Classed as a building of national importance, the chapel is the only surviving structure of the preceptory of the Knights Hospitallers of the Order of St John of Jerusalem. The timbers of the building have been dated to the early 13th century. The preceptory is thought to have gone out of use by 1338. The chapel is largely unchanged from medieval times and inside provides a peaceful and reflective insight into life 700 years ago. The adjacent house is a private residence dating from the 16th Century, with substantial later alterations.

St John's Jerusalem is built on an island formed by the River Darent and a moat. The surrounding gardens are a mass of blooms and insect activity during spring and summer, and it is a place of tranquillity just a short distance from the main road.

Only the chapel and gardens are open to visitors.

Description supplied by the event organiser.