The painted glass at All Saints', North Street, York, is exceptional even in York, and although that of the fourteenth century in two of the windows (II, VIII), is not outstanding, the early fifteenth-century glass is of very high quality. The Prick of Conscience window (III), is unique, and the theme of the Corporal Acts of Mercy, window IV, is rare. The whole medieval body of glass was limited to the church which existed before the penultimate bay, and the tower and the aisles on either side of it, were added by c. 1450. Windows which replaced the previous doorways in the fourth bay, on either side, contained plain glass in the later Middle Ages.