Edmund Butler of Pottlerath, a noted patron of literature, successfully petitioned Pope Pius II for the foundation of the friary in 1461. After Edmund died in 1462, the actual buildings were erected by his son, James, probably after 1467 when he received a papal dispensation to marry his concubine, to whom he was related. In 1472 the friary became observant—its community adopted the fashion then spreading across Europe for the strictest observance of the monastic rules — and in 1479 it became the centre of the Irish Observant Congregation.