Recent work at St Cadoc's Church Trevethin revealed oak timbers from the old Church roof reused as floor joists. The timbers were dendrochronologically dated. One returned a date range of 1457-1487 and probably originated from the earlier medieval Church on the site that was remodelled in 1845-1847 by Thomas Wyatt. Excavations proceeded beneath the timber floor supports and revealed multiple graves, often containing three or more burials (probably of family groups) and mostly dating from the mid 17th to the early 19th centuries.