St Nicholas Chapel, Little Coggeshall.
(A history of the chapel is available here; St Nicholas Chapel.)

This is is the most complete of the Coggeshall abbey buildings. It was built around 1220 and is a simple rectangular building (as were all Cistercian gatehouse chapels), but is unique in its use of locally made brick, perhaps the earliest post-Roman brick in England. This photo was taken before the restoration of the chapel in 1897.
'In 1860 the chapel of St Nicholas, together with the land on which it stood was purchased from the then owner, Jonathan Bullock. The doorway was restored and the place re-thatched. In the 1890s a more extensive restoration was undertaken and the chapel was given a tiled roof. Restoration of the window surrounds was undertaken and matching bricks were specially moulded for this, and finally the windows were glazed. The chapel was used as Coggeshall's parish church for a while during World War Two as St. Peter's had been bombed in 1940. The chapel is still in use today.
Ref 25/21.