Carmarthen Priory

Celtic monastery

A Celtic monastic settlement existed at Carmarthen prior to the Norman Conquest. It was called Llandeulyddog and was the church of Saint Teulyddog. This is likely the same church as Llan Teulydawc, one of the Seven Bishop-Houses of the Kingdom of Dyfed, and may date back to the 6th century.^{[1][2][3][4][5][6]}

Benedictine monastery

Following the establishment of a royal castle at Carmarthen in 1109, the newly built St Peter's Church and the older church at Llandeulyddog were placed under the jurisdiction of Battle Abbey by Henry I. A Benedictine monastery was established on the site in c. 1110.^{[1][2][3][7][8]}

Augustinian priory

In 1125, ownership reverted to Bishop Bernard of St Davids, who established an Augustinian priory on the site dedicated to St John the Evangelist and the Celtic saint Teulyddog.^{[1][2][3][5][4][7]}

In 1208, William de Londres (a Norman lord and one of the Twelve Knights of Glamorgan) attempted to take over the Priory. He replaced the canons with those of Llanthony Secunda, but they were later removed.^[5]

In 1403, the Priory was looted during the Owain Glyndŵr rebellion.^[5]

Poets were often welcomed to stay at the Priory, with Lewys Glyn Cothi praising the Priory.^[9] The Eisteddfod of 1450 was likely hosted at the site.^[2]

In 1534, Prior Griffin Williams acknowledged the Act of Supremacy and, on 17 February 1537, the Priory was dissolved during the dissolution of the monasteries. At the time, it housed twelve canons and about eighty people.^[2][3][5]

Post-Dissolution

After the Priory was dissolved, a mansion was built within the buildings, and the site became a private house, but, by 1748, it was in ruins.^[2][3][10]

One of the buildings was used as a poorhouse from 1758, before the building of Carmathen Workhouse.^[2][10]

The ruins were destroyed around 1781 by Lord Cawdor to make way for a lead smelting works. The leadworks were later demolished, and the site was further demolished in 1855–1860 for the railway.^[2][3][10]