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Cof Cymru: National Historic Assets of Wales · Wales

Mynydd Rhiw Round Cairns

Botwnnog, Gwynedd, Wales

A scheduled monument in Botwnnog, Gwynedd, recorded as Round Cairn (Prehistoric).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Mynydd Rhiw Round Cairns, Botwnnog, 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
Scheduled monument
Site type
Round Cairn
Period
Prehistoric
Community
Botwnnog
Unitary authority
Gwynedd
Country
Wales
Coordinates (centre of the scheduled area)
52.83471, -4.62499
SAM number
CN102
Cadw record number
2432

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)
  • 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)
  • 1899 · 134 Pwllheli (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)

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This record in Cadw's own full report ↗

Cadw's description

The following provides a general description of the Scheduled Monument.

Four cairns, probably burial cairns dating to the Bronze Age (c. 2300 - 800 BC), arranged roughly in a straight line. They are situated on a prominent ridge a little below the summit of Mynydd Rhiw. All command an extensive view, but nos.2 and 4 are on top of local outcrops and overlook a very wide area. No.3 is in a hollow between these and has a more restricted view, while No.1 is on a lower natural eminence N of No.2.

A fifth cairn used to exist on the top of Mynydd Rhiw at SH 2297 2949, but a building now occupies this spot.

The monument is of national importance for its potential to enhance our knowledge of prehistoric ritual and funerary rites. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structures themselves may be expected to contain archaeological information concerning chronology and building techniques.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

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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