Wall, East of Bastion 20 is a Grade I listed building in the Oxford local planning authority area, England. First listed on 12 January 1954. A Medieval Wall.

Wall, East of Bastion 20

WRENN ID
lapsed-panel-wagtail
Grade
I
Local Planning Authority
Oxford
Constituency
Oxford West and Abingdon MP: Layla Moran (LD)
Country
England
Date first listed
12 January 1954
Type
Wall
Period
Medieval
Address
Wall, East of Bastion 20, South East Angle
OS grid reference
SP 518 060
Coordinates
51.75084, -1.25026
Source
Historic England listing

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

Description

The structure is a section of the city wall, located east of Bastion 20, dating back to 1485. It sits between the southeast angle and Christchurch Wall. The base of the wall is medieval, while the upper part has been altered with later and modern additions.

Local climate

Wall, East of Bastion 20 sits in a drier-than-average part of the UK, with an average of 730 mm of rain a year. This makes it drier than 77% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 70% of listed buildings.

It experiences an average of 34 freeze-thaw cycles a year, more than 50% of listed buildings. Of these, 15 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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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Bastion 20 Grade I 36 m
  2. Wall, South of Summerhouse, Up to South East Angle Grade I 49 m
  3. Wall, West of Bastion 20 Grade I 66 m
  4. Merton College, Wall Fronting Merton Street Grade II 75 m
  5. Meadow Cottages Grade II 76 m
  6. Merton College, Screen on South Side of St Albans Quadrangle Grade II 79 m
  7. Merton College, Garden House (In North East of Garden) Grade II 86 m
  8. Merton College, St Albans Quadrangle Grade II 86 m
  9. Street Surface of Merton Street Grade II 87 m
  10. Entrance Screen to Christchurch Meadows Grade II 91 m