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Cof Cymru: National Historic Assets of Wales · Wales

Glantwymyn

Llanbrynmair, Powys, Wales

A Grade II listed building in Bont Dolgadfan, Llanbrynmair, Powys, designated on 31 January 1997.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Glantwymyn, Llanbrynmair, Powys, 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
Domestic
Date of designation
31 January 1997
Locality
Bont Dolgadfan
Community
Llanbrynmair
Unitary authority
Powys
Country
Wales
Coordinates
52.58798, -3.64502
Cadw reference
18126

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 1608 map "(13) Cambriae Typus." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1608 · (13) Cambriae Typus. (David Rumsey Map Collection, Stanford Libraries)
  • 1795 · To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most… (Llyfrgell Genedlaethol Cymru – The National Library of Wales)
  • 1830 · V.3:11-15:XV. Britisches Reich. A. Kon: England. b. Frstenthum Wales: Shire: 37-40 (David Rumsey Map Collection, Stanford Libraries)
  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)

Get directions ↗

This record in Cadw's own full report ↗

Cadw's description

The house is located at the centre of the small former flannel weaving community, where the small Wern brook joins the Afon Twymyn.

c. 1820-1830. Rubble stone and slate roof. Two storeys, consisting of a single subdivided room on each floor. Boarded door opens to lobby at the side of the gable stack. Four-paned timber cross windows, the upper windows gabled above the eaves. Montgomeryshire pebble paving in front of door.

Main living room is partitioned to provide service room and stair at rear, rising to landing and single chamber on upper floor.

Included as one of the best preserved and most westerly examples of this type of 'cube' house.

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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