Aerial photograph of St Dogmaels Abbey from the north-west. Taken on 23 June 2005.

The medieval Abbey of St Mary at St Dogmaels was founded in 1115 by the FitzMartin family of Cemais and was of the Order of Tiron. Caldey Priory, Caldey Island was a daughter house to St Dogmael's. established in The abbey was re-modelled in the thirteenth and fourteenth centuries and in the sixteenth century the northern transept was given a fan vaulted roof.

Substantial remains of the abbey church survive, including the western end wall, the north wall, northern transept and the eastern end walls of the crypt. Extensive monastic buildings also survive to the south of the Abbey, and a detached building of the late thirteenth century, possibly an infirmary chapel or infirmary is located to the south-east.