Archbishop Courtenay was licensed to build a Collegiate Church in 1395. He died in 1396 and the building was continued by Archbishop Arundel in 1396-1398. The college was for a master and 24 chaplains. The main surviving building consists of the Gatehouse and to the west of it, the Refectory, Kitchen and Scullery with the Dormitory and Infirmary above. It is of Kentish ragstone in Perpendicular style. The gatehouse is a 3 storeyed square building containing pointed stone carriage and pedestrian arches on the ground floor and castellated parapet above.