| 1086 |
Mention of Church in Cheshunt in Doomsday Book. |
| 1331 |
Record of meeting of Augustines. |
| 1418-1448 |
Present building created by rector Nicholas Dixon. His tomb is beneath the present alter. Dedicated to St Mary instead of St John. Further re-orderings in 19th century and again in 1961. In the early 19th century there were galleries. |
| 1625 |
Royal coat of arms is of Charles II who died at Theobalds in 1625. |
| 1636-1760 |
Original six bells installed. |
| c1750 |
Clock installed. |
| 1872-3 |
South Chapel opened. |
| 1887 |
Wooden screen installed across nave. |
| 1891 |
Organ rebuilt in present position, originally beneath tower, and then in choir stalls. |
| 1902 |
Wooden redos behind alter installed. |
| 1911 |
Bells recast, two more added. |
| 1920 |
War Memorial installed - includes black and white tiles in sanctuary. |
| 1945 |
V-2 landed at junction of Bury Green Road and Pengelly Close. Destroyed most of the 15th century windows on south side and damaged east window. Restored east window shows a Christmas tree and the children of the then Vicar (bottom right hand corner of left hand panel). |
| 1961 |
Wooden screen across nave removed. |
| 1971 |
Bishops College closes. Many fittings moved to South Chapel. |
| 2008 |
Current incumbent, the Revd John Williams, installed at St Mary's Church. |
