St Tyfrydog's Church, Llandyfrydog is a small medieval church, in Llandyfrydog, Anglesey, north Wales. The date of establishment of a church on this site is unknown, but one 19th-century Anglesey historian says that it was about 450. The oldest parts of the present building are dated to about 1400, with the chancel dating from the late 15th or early 16th century. It is built from rough, small, squared stones, dressed with limestone. One of the windows on the south side is raised to illuminate the pulpit, a decision that in the eyes of one 19th-century commentator "disfigures the building."

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.