The original church was built in the 12th century as a daughter temple of the Benedictine Abbey of St. John, or later the cathedral of Brecon. From 1200 there is information about the donation of 12 pence by the city council for a lighting of a taper to burn, during mass for the souls of donors. In the fourteenth century, the church was thoroughly rebuilt and enlarged by a tower in 1521, founded by Edward Stafford, Duke of Buckingham. At the beginning of the 19th century and then in 1857, the building underwent renovation.
At the end of the Middle Ages, the church consisted of two naves on the plan of an elongated rectangle, with the main nave not having an chancel external separated, and the southern aisle being slightly shorter. On the north-east side there was a shoemakers’ chapel from which the portal led to the sacristy, while on the west side a 27-meter high four-sided tower was added to the nave. In its north-eastern corner there is a polygonal turret containing a staircase.
Website historypoints.org, St Mary’s Church, Brecon.
Website stmarysbrecon.org.uk, History.