St Tysilio's Church, Church Island; St Tysilio's Church, Ynys Tysilio

The National Monuments Record of Wales records St Tysilio's Church, Church Island; St Tysilio's Church, Ynys Tysilio as Church from the Medieval period. The saved point comes from the official national record. Inclusion does not by itself mean that the public may enter the place.

St Tysilio's Church, Ynys Tysilio, was built in the medieval period, likely between the 12th and 14th centuries, and is dedicated to St Tysilio, an early Christian hermit associated with the area. The church is significant as a remote religious site on an island in Llyn Cynwyl, reflecting the early Christian and monastic traditions of north Wales.