Kilmacduagh sits at the edge of the Burren, dominating the rural landscape some 5km south-west of Gort, in Co. Galway. In the medieval period, it was the most important church of the Uí Fiachrach Aidhne, a powerful local dynasty who held lands that stretched from the Atlantic coast to the mountains of the Burren and Slieve Aughty. By the twelfth century, Kilmacduagh had an enclosed settlement with the main church at the centre, at least three subsidiary churches, a round tower, the grave of the founder, Cólmán mac Duach, and a well dedicated to him. The settlement was transformed when the main church was enlarged as a cathedral and a monastery for Augustinian canons was established in the thirteenth century.