Ruggero Longo is Research Assistant in the Dipartimento di Scienze dei Beni Culturali at the Università della Tuscia, Viterbo. His PhD is in Art History, and he specializes in archaeometric and diagnostic systems for cultural heritage. His research concerns the opus sectile decorations of Norman Southern Italy and intercultural relationships and exchanges in the medieval Mediterranean. He initiated a project concerning the Romanesque church of San Menna in Campania in 2009 and organized a conference on this topic in June 2010. Since 2009, he has worked on the nomination of “Palermo arabo-normanna and the cathedrals of Cefalù and Monreale” as a UNESCO World Heritage site. In 2012, he was awarded the Aga-Khan Postdoctoral Fellowship at Harvard University, where he did research concerning the opus sectile decoration of Mamluk Cairo and its relationship with Norman Sicily. He is currently working on a project based on cognitive study, archaeological researches, and the valorization of the Norman Palace in Palermo. He will be a Research Fellow at the Bard Graduate Center from December 2014 to January 2015. While in residence at the BGC, he will conduct research on workshop dynamics in the Middle Ages.