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Cof Cymru: National Historic Assets of Wales · Wales

Mausoleum

Llandwrog, Gwynedd, Wales

A Grade II listed building in Glynllifon, Llandwrog, Gwynedd, designated on 29 April 1952.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Mausoleum, Llandwrog, Gwynedd, 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
Commemorative
Date of designation
29 April 1952
Locality
Glynllifon
Community
Llandwrog
Unitary authority
Gwynedd
Country
Wales
Coordinates
53.06793, -4.29144
Cadw reference
20464

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 1795 map "To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most humbly inscribed by his obedient humble servant" (Llyfrgell Genedlaethol Cymru – The National Library of Wales).

Historical maps covering this location

  • 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)
  • 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 · 118 Nevin (Hills) (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

Surrounded by trees on a knoll within the parkland approximately 1km south-east of the house and 0.5km south-east of Fort Williamsburg.

Begun by the 2nd Lord Newborough in 1826 but unfinished when he died in 1832. The 3rd Lord Newborough continued the work until the major fire of 1836 after which time attention was diverted to the house and completion of the mausoleum was abandoned having cost £10,000. It has therefore never been used for its intended purpose.

Glynllifon was the seat of the Wynn family and Sir Thomas John Wynn became the 1st Lord Newborough in 1776. The house was rebuilt after a fire 1836-48 by Edward Haycock, architect of Shrewsbury.

Circular tower built of coursed local rubble, slightly battered to base and then narrowed above ground floor cornice. There are three dressed stone, segmental arched, windows to the top and a dressed stone 4-centred arched gateway to the south.

Brick-vaulted central lobby with winding stone staircase to left and round-headed arch into flat-roofed perimeter passage to right leading to a cruciform ground floor chamber. The original intention had been to have a 2nd floor chapel, now a plain octagonal chamber with groined vault.

Listed as a C19 folly with origins as a rare example of an estate mausoleum and for its special interest to the history of Glynllifon.

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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