Cilcennin is the site of a historic slaughter in 1210, when Owain Goch ap Gruffydd and three hundred men attacked and killed soldiers from a superior English and Welsh troops' body under the command of their uncle Maelgwn ap Rhys.[1]
The church in Cilcennin is dedicated to St. Cannen, and was rebuilt in the 19th century through public contributions.[1]