Remains of Church of St Constantine is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 6 June 1969. A Medieval Church ruins.

Remains of Church of St Constantine

WRENN ID
gentle-jamb-grove
Grade
II
Local Planning Authority
Cornwall
Constituency
North Cornwall MP: Ben Maguire (LD)
Country
England
Date first listed
6 June 1969
Type
Church ruins
Period
Medieval
Address
Remains of Church of St Constantine, St. Merryn
OS grid reference
SW 865 748
Coordinates
50.53473, -5.0138
Source
Historic England listing

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

Description

The remains of the Church of St Constantine are medieval ruins located in St Merryn. Constructed from slate stone and shale, what remains is likely the west tower, with walls standing about 20 feet high and featuring a high slate stone arch. According to the Provisional List issued in August 1960, the original structure included a nave, chancel, south aisle, and west tower. Most of the architectural details have been removed, and the dimensions of the church were approximately 40 feet by 24 feet.

Local climate

Remains of Church of St Constantine sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.

It experiences an average of 6 freeze-thaw cycles a year, fewer than 96% of listed buildings. Of these, 2 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.

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