Llanwenog can be found near Lampeter in the county of Ceredigion, south Wales. The Nant Cledyn, a tributary of the river Teifi, passes close by. The village church is dedicated to 6th century Saint Gwenog, and is the most complete medieval church in this part of Ceredigion.

Although it dates back to the 13th century, it was vastly expanded in the 15th century by Sir Rhys ap Thomas, who owned the land surrounding the church. The building is dominated by a square-shaped tower and contains an interesting 12th century font.

Llanwenog holds an important place in the history of Wales. It is distinguished as the scene of a memorable battle, which was fought in 981, between the Danes, under their famous leader Godfrid, and the native Welsh under Eineon ab Owain (in which the former were totally defeated), or, according to Dr. Meyrick, between Eineon and his countryman Hywel ab Ievav; and a square intrenchment in a field called Cae'r Vaes, or " the field of battle," on the farm of Ty cam, in this parish.