Media type: E-Article Title: The Mosaics of Gregory IV at S. Marco, Rome: Papal Response to Venice, Byzantium, and the Carolingians Contributor: Bolgia, Claudia Published: Medieval Academy of America, 2006 Published in: Speculum, 81 (2006) 1, Seite 1-34 Language: English ISSN: 2040-8072; 0038-7134 Origination: Footnote: