The Royal Commission on the Ancient and Historical Monuments of Wales (RCAHMW) has undertaken excellent work over the last few years such as through its collaborative CHERISH programme.
Mae Comisiwn Brenhinol Henebion Cymru (CBHC) wedi bod yn gwneud gwaith rhagorol dros y blynyddoedd diwethaf, megis drwy raglen gydweithredol CHERISH.