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Cof Cymru: National Historic Assets of Wales · Wales

Grisiau Mawr (steps between Pencei (Cornhill) and Ffordd Garth)

Porthmadog, Gwynedd, Wales

The record

Designation
Listed building, Grade II
Broad class
Domestic
Date of designation
30 March 1951
Locality
Porthmadog
Town
Porthmadog
Community
Porthmadog
Unitary authority
Gwynedd
Country
Wales
Coordinates
52.92337, -4.13094
Cadw reference
4416

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

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1795 "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).

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This record in Cadw's own full report ↗

Cadw's description

On the W side of Cornhill, between Ty Toronto and No 7 Cornhill.

Probably built in the mid C19 to connect the harbour with new houses on Garth Road, which were built from the mid C19 onwards. The steps are indicated on the 1871 Tremadog estate plan and shown on the 1885 harbour survey.

Three steep contiguous flights of steps with renewed concrete treads over the original slate. The steps are between garden walls and end walls of the abutting buildings. Only at the bottom is there an iron handrail.

Listed as a distinctive historical townscape feature for its contribution to the historical integrity of Porthmadog harbour.

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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