A national map of Wales's 4,000+ legally protected Scheduled Monuments — Cadw's register of nationally significant archaeological sites, from Neolithic burial chambers to 20th-century military structures. Sourced from the Cadw/Welsh Historic Environment Service dataset (Open Government Licence) and organised into ten layers by period and type: Prehistoric (Ritual & Funerary, Defensive, Domestic, Monuments, Other), Roman, Early Medieval, Medieval, Post-Medieval & Industrial, and Unclassified. Each pin links to its Cadw record and Cof Cymru entry. Compiled by Graham Tudor Emmanuel, Kidwelly — Vivit Post Funera Virtus.