Church of St Mary Sub-Castro is a Grade I listed building in the Dover local planning authority area, England. First listed on 7 March 1974. A Medieval Church.

Church of St Mary Sub-Castro

WRENN ID
grey-cobble-thistle
Grade
I
Local Planning Authority
Dover
Constituency
Dover and Deal MP: Mike Tapp (Lab)
Country
England
Date first listed
7 March 1974
Type
Church
Period
Medieval
OS grid reference
TR 326 418
Coordinates
51.12841, 1.32337
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The Church of St Mary Sub-Castro, located at Dover Castle, is believed to have been founded around 1020 AD. The exterior features two storeys of flint, with some reused Roman brick window dressings and modern ashlar dressings. It has a modern tiled roof and a restored tower. In the 18th century, the church was roofless and used as a coalstore, but it was restored for use as a garrison church for the castle by Sir Gilbert Scott in 1862. Inside, there is a chancel arch made of Roman brick, a blocked Saxon doorway, and the site of a military altar dating from 1225 AD. The interior also includes a Victorian wooden roof and stained glass windows, along with mosaics created by Butterfield in 1888.

Local climate

Church of St Mary Sub-Castro receives an average of 780 mm of rain a year. This makes it drier than 59% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.

It experiences an average of 8 freeze-thaw cycles a year, fewer than 94% of listed buildings. Of these, 4 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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