Trefeca, located between Talgarth and Llangorse Lake in what is now south Powys in Wales, was the birthplace and home of the 18th-century Methodist leader Howell Harris (1714–1773),. It was also the site of two Calvinistic Methodist colleges at different times; the first sponsored by Selina, Countess of Huntingdon, in the late-18th century; the second supported by the Welsh Calvinistic Methodist Church in the later 19th century.