Micrologus Journal of the SISMEL (Società Internazionale per lo Studio del Medioevo Latino) Scientific editor: Agostino Paravicini Bagliani (SISMEL, Firenze) ADVISORY BOARD Bernard Andenmatten ( Lausanne ), Jean-Patrice Boudet ( Paris ), Charles Burnett ( London ), Jacques Chiffoleau ( Avignon ), Chiara Crisciani ( Pavia ), Paolo Galluzzi ( Firenze ), Tullio Gregory ( Roma ), Ruedi Imbach ( Lausanne ), Danielle Jacquart ( Paris ), Michael McVaugh ( Chapel Hill, NC, USA), Piero Morpurgo ( Vicenza ), Michel Pastoureau ( Paris ), Michela Pereira ( SISMEL), Francesco Santi ( Cassino ), Jean-Claude Schmitt ( Paris ), Giacinta Spinosa ( Roma ), Giorgio Stabile ( Roma ), Jean-Yves Tilliette ( Genève ), Baudouin Van den Abeele ( Bruxelles-Louvain-la-Neuve ), Jean Wirth ( Maisons-Laffitte ) ISSN 1123-2560 ISBN 000-00-0000-000-0 Micrologus is a peer-reviewed journal ii Pag. I bianca