St Hywyn's Church sits on the sea-shore in the seaside resort of Aberdaron, Gwynedd, on the edge of Wales. In the fifth century, when it was founded, St Hywyn's would have been a simple wooden structure but the oldest portion of the present church dates from the twelfth century. Aberdaron had a monastic community linked to Bardsey Island the centre of great pilgrimages. The fine 12th century west door and the extension of the church in the 16th century are evidence of the wealth brought to St Hywyn's by the pilgrims.

St Hywyn's is also home to the Anelog Stones, a pair of 6th century inscribed grave stones, that are to be found on the north wall of the Church. The two stones were found at Capel Anelog on the eastern slope of Mynydd Anelog (Anelog mountain) just a few miles north of Aberdaron. It is thought that this may have been the location of the original monastery that was established before Aberdaron and Bardsey.