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Cof Cymru: National Historic Assets of Wales · Wales

Tower (Twr Bach)

Rhosyr, Isle of Anglesey, Wales

A Grade II listed building in Llanddwyn Island, Rhosyr, Isle of Anglesey, designated on 30 January 1968.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Tower (Twr Bach), Rhosyr, Isle of Anglesey, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Listed building, Grade II
Broad class
Maritime
Date of designation
30 January 1968
Locality
Llanddwyn Island
Community
Rhosyr
Unitary authority
Isle of Anglesey
Country
Wales
Coordinates
53.13426, -4.41287
Cadw reference
5552

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1883 map "Watershed map England, Wales 3." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1896 · Sheet 7. Ordnance Survey of England and Wales. (David Rumsey Map Collection, Stanford Libraries)
  • 1899 · 105 Carnarvon (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)
  • 1919 · Sheet 41. Anglesey. (David Rumsey Map Collection, Stanford Libraries)

Get directions ↗

This record in Cadw's own full report ↗

Cadw's description

Located at the end of the breakwater at the SE extremity of Llanddwyn Island.

Probably built late C18, the predecessor to the larger, more visible Twr Mawr (Llanddwyn Lighthouse) which was erected early C19 (probably between 1800 and 1823).

Circular day-mark tower, built as a landmark for shipping. Built of local rubble, with tapering walls and saucer dome; large square headed doorway at base.

A good surviving example of a late C18 day-mark, and part of a group with the lighthouse, keepers' and pilots cottages nearby.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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