Trefeca (also Trefecca, Trevecca, and Trevecka), 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 (Welsh: Hywel Harris). It was also the site of two Calvinistic Methodist colleges at different times; the first sponsored by Selina, Countess of Huntingdon (an English methodist leader) in the late eighteenth century; the second supported by the Welsh Calvinistic Methodist Connexion in the later nineteenth century.