Bishop John Innes ( 1407 – 14 ) contributed greatly to the rebuilding of the cathedral , as evidenced by the inscription on his tomb praising his efforts . When he died , the chapter met secretly — " in quadam camera secreta in campanili ecclesie Moraviensis " — and agreed that should one of their number be elected to the see , the bishop would grant one third of the income of the bishopric annually until the rebuilding was finished . The major alterations to the west front was completed before 1435 and contain the arms of Bishop Columba de Dunbar ( 1422 – 35 ) , and it is presumed that both the north and south aisles of the choir was finished before 1460 , as the south aisle contain the tomb of John de Winchester ( 1435 – 60 ) . Probably the last important rebuilding feature was the major restructuring of the chapterhouse between 1482 and 1501 , which contain the arms of Bishop Andrew Stewart .