© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Caer Idris is a prehistoric hillfort situated on the island of Anglesey in North Wales, designated under Cadw's Scheduled Ancient Monument register as AN051. The site comprises a substantial defensive enclosure with multiple ramparts and ditches, characteristic of Iron Age fortification practices in Wales, though the precise chronology of its construction and use remains subject to ongoing archaeological interpretation. Its strategic location reflects the importance of elevated positions for control and defence during the later prehistoric period. The hillfort represents a significant example of Iron Age settlement hierarchy and defensive architecture in North Wales, though detailed archaeological investigation of the site has been limited.
Caer Idris Hillfort is a scheduled monument protected by Cadw under reference AN051. View the official record →
Caer Idris is a prehistoric hillfort situated on the island of Anglesey in North Wales, designated under Cadw's Scheduled Ancient Monument register as AN051. It is designated a Scheduled Ancient Monument by Cadw under reference AN051.
Caer Idris Hillfort dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across Britain.
Caer Idris Hillfort is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is AN051.
Several scheduled monuments lie within 10 km, including Segontium Roman Fort (5.7 km), Carreg Lefain Cairn (7.8 km), Parc y Gleision Standing Stone (8.1 km).
Aubrey generates in-depth historical research for any address in Britain — drawing on scheduled monument data, Domesday records, Roman heritage, PAS finds and medieval history to reveal the complete story of a landscape.
Research the area around Caer Idris Hillfort