In the Synod of Jaca (1063), Bishop Paterno of Zaragoza, with express consent of its clergy, ceded to the bishopric of Huesca the monastery and church of Santa Engracia and Holy Mass.
An excavation in 1389 discovered the bodies Saint Engratia and Lupercus, in two niches within a mound of stone with their names inscribed which may have been placed there by Mozarabs who re-buried them again.
Devotion to the Saint Engratia increased as a result of the gratitude of King John II of Aragon "the Great" who attributed the healing of his cataracts to the miraculous nail of her martyrdom.
Collateral to the Agustin sepulcher was that of the famous writer and analyst Jerónimo de Zurita, whose epitaph read: The cloister had a grand gallery consisting of large columns of marble and ornate sculptures and paintings by masters of great merit.
All that remained was the famous façade of marble and alabaster whose Plateresque style appears to be work by Diego Morlanes, son of Juan, the original sculptor.