The church is one of the few surviving
abbey churches of the medieval period and one of the largest. It was founded by Benedict of Auxerre in 1069 and subsequently built by the
de Lacy family. On 31 May 1256, the abbey was bestowed with the grant of a
mitre by
Pope Alexander IV and from this date was a "
Mitred Abbey". This privilege fell into abeyance a number of times, but on 11 April 1308, Archbishop
William Greenfield confirmed the grant, and Selby remained a "Mitred Abbey" until the
Dissolution of the Monasteries. Archbishop
Walter Giffard visited the monastery in 1275 by commission, and several monks and the abbot were charged with a list of faults including loose living: many complaints referred to misconduct with married women. In 1279 Archbishop
William de Wickwane made a visitation, and found fault with the abbot as he did not observe the
Rule of Saint Benedict, was not singing mass, preaching or teaching, and was seldom attending chapter. Things had not improved much in 1306 when Archbishop
William Greenfield visited, and similar visitations in later years resulted in similar findings. The community rebuilt the choir in the early 14th century, but in 1340 a fire destroyed the chapter house, dormitory, treasury and part of the church. The damage was repaired and the decorated windows in the south aisle of the nave were installed. In 1380–1 there were the abbot and twenty-five monks. In 1393
Pope Boniface IX granted an
indulgence to pilgrims who contributed to the conservation of the chapel of the Holy Cross in the abbey. The 15th century saw more alterations to the abbey. The perpendicular windows in the north transept and at the west end of the nave were added, and the
sedilia in the sanctuary were added. One of the final additions was the Latham Chapel, dedicated to St Catherine, east of the north transept, in 1465. In the
Valor Ecclesiasticus of 1535 the abbey was valued at £719 2s. 6¼d (equivalent to £ in ). The abbey surrendered on 6 December 1539. The community comprised the abbot and 23 monks. The abbot was pensioned off on £100 a year (equivalent to £ in ) ; the prior got £8 and the others between £6 6s. 8d. (ten
marks) and £5 each.
Abbots of Selby Source: ==Post-monastic history==