The priory was founded in 1142 as the
Augustinian priory of Clack, and dedicated to
Saint Mary. It was well-sited on a high ridge near a
holy well, with further
springs nearby; there is some evidence that a chapel of the era of
Henry I already existed at the holy well. Throughout most of its early history, the priory also enjoyed royal support, being granted a charter by
Henry II some time between 1173 and 1179;
Richard I also lent assistance for the priory to break away from the abbot of Cirencester to become a priory in its own right, and
King John, a frequent visitor, intervened to confirm this secession. This does not imply that the community lived in luxury or were corrupt. It was not a backwater, since in its latter years it had benefitted from the residence of its then prior, Thomas Wallashe, in the household of
Cardinal Bainbridge,
Archbishop of York, during his embassy in Rome (1509–1514), leading to grant of extensive papal privileges to the priory. ==The Dissolution==