1. Seal CLVIII.2 Reference (shelfmark): Seal CLVIII.2 Title: Scope & Content: LEADEN BULLA of Isaac Comnenus, Emperor of the East, 1057-1059. Isaac Comnenus; Emperor of Eastern Empire: Bulla: 1057-1059. Collection Area: Western Manuscripts Languages: English Date Range: 1057-1059 Extent: 1 item