11. Seal CLVII.22 Reference (shelfmark): Seal CLVII.22 Title: Scope & Content: An ostiarios and proedros. Proedros and Ostiarios: A. Bulla: 13th cent. (?). An Ostiarios and Proedros: Bulla: 13th cent.(?). Collection Area: Western Manuscripts Languages: English Date Range: 13th century Extent: 1 item