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Llywel is a small village that gives its name to Llywel community in Powys, Wales. The main settlement in the community is Trecastle
The Church of Saint David (Welsh: "Eglwys Dewi Sant") is found in Llywel. It is said to have originally been dedicated to three saints: David, Darn (Paternus), and Teilo; and known as Llantrisant. Its name was changed when it was granted to the Chapter of Saint David sometime between 1203 and 1229
The church displays Perpendicular Gothic architecture. Llywel StoneAn Ogham stone known as the "Llywel Stone" that was found at the church is now on display at the British Museum.