the mine is still the Ogof. A number of Roman artefacts have been found in the mine including a number of bones and burials, and a hoard of 30 first and second century silver coins of Roman currency found in 1965 by some schoolboys, now conserved at the National Museum of Wales. The mine was probably abandoned c. 200 CE. In Anglo-Saxon times, Offa's Dyke was built c. 430 and 652, through what is probably the main street in Llanymynech, on the east side of the road. It is thought the west wall of St Agatha's churchyard was built on the raised part of the dyke. Today, the Offa's Dyke Path passes through the village. Under the Normans, the village came under the rule of the Marcher Lord (Lord of the March or border counties), and a fortification called Carreghofa Castle was built by the Earl of Shrewsbury around 1101. The place where the castle was probably built, at Tanat Camp, just to the west of Llanymynech Hill and overlooking the Tanat valley, implies it was defending the hill which was being mined for copper and lead, as well as silver. Being situated directly on the borderlands, the castle changed hands between the English and Welsh numerous times during the 12th and 13th centuries. In 1187 the castle was captured by Owain Fychan, prince of Powys, who was then murdered at the castle by his cousins Gwenwynwyn and Cadwallon. In 1194, the castle was recaptured by the English with the purpose of reopening the mines on Llanymynech Hill and extracting silver. Richard I had been captured and held for a ransom of £100,000, and the Bishop of Salisbury, Hubert Walter, heard of the discovery of silver at the Carreghofa Mine on Llanymynech Hill; he decided to develop the mine and reopen the mint at Shrewsbury to refine the silver and make it into coins. Unfortunately, the total amount of silver produced only came to the value of £20, 11 shillings and 11 pence. This mine was located north of the present quarry, and just south of the present golf course clubhouse. In the 1230s, the castle was destroyed and the stones were eventually removed and used to construct nearby Carreghofa Hall. Very little remains of the castle today. The Welsh Church Act 1914 disestablished the Church in Wales from the Church of England. During the period while the enactment was