1. Seal CXLVII.21 Reference (shelfmark): Seal CXLVII.21 Title: Scope & Content: Octavian, Archbishop of Armagh, 1480-1513. Octavian, Archbishop of Armagh: Seal: 1480-1513. Collection Area: Western Manuscripts Languages: English Date Range: 1480-1513 Extent: 1 item