The north west window in the chancel contains images of four knights who were important descendants of the Abbey's founder Robert Fitzhamon, along with Robert himself.
Gilbert de Clare, 5th earl of Gloucester, and his father Richard de Clare, were among the 25 barons who pledged to enforce the provisions of the Magna Carta, as a result both were excommunicated by Pope Innocent III.
The east window at Gloucester Cathedral was created as part of the rebuilding of the abbey church of St Peter. Built in the Perpendicular style it was the largest window in Europe. The decorative scheme portrays the Coronation of the Virgin and the glass mostly dates from the 1350s.