St Eleth's Church, Amlwch is a parish church built in the Neo-classical style in 1800 in Amlwch, a town on the island of Anglesey in north Wales. It stands on the site of earlier buildings, with the first church here said to have been established by St Elaeth in the 6th century. Increasing prosperity in the town through copper mining during the 18th century led to the construction of a new church to serve the growing population.

St Gwenllwyfo's Church is a 19th-century parish church near the village of Dulas, in Anglesey, Wales. It was built between 1854 and 1856 to replace an earlier church in the parish, also dedicated to St Gwenllwyfo, which needed repair and had become too small for its congregation. The new church was built nearer to the Llys Dulas estate, whose owner contributed £936 towards the total cost of £1,417, rather than near the area where many of the parishioners lived. In 1876, Sir Arundell Neave donated 27 panels of 15th and 16th-century stained glass that had once belonged to a Flemish monastery.