The centre of Holyhead, a town of over 11,000 inhabitants on Holy Island, is built around the church of St Cybi, which is located in a 4th century Roman fort. Unfortunately, the church was under renovation in the summer of 2024 and that was all there was to see.


The original church was constructed at Holyhead around 540 AD by St Cybi, a cousin of St David. The church was sacked by Viking invaders in the 10th century and damaged again in 1405 by Henry IV's invading force. The present church was built in the 13th century.