Excavations by the Trostrey Excavation Group has revealed a multiperiod complex comprising a Neolithic long cairn, Bronze Age cairn and timber circle or shrine, potential evidence for a timber 'altar' and a stone circle, together with medieval settlement evidence. The sequence of monuments is wel summarised in Mein, A.G. 2000, 'Trostrey Castle', Archaeology in Wales 40, 78-81.

T. Driver, RCAHMW