 The first recorded incumbent for the parish was Rector Thomas Humphrey in 1662.The floor of the church was flagged in 1786 and, three years later, some medieval paintings were lost during replastering and repainting of the walls.St Tanwg's church had been the parish church for the parish of Llandanwg, which included the small town of Harlech, for hundreds of years but between 1839 and 1841 a new parish church (also dedicated to St Tanwg) was built in Harlech.