Byzantium the Crusader Levant Egypt and Italy. The customary treatment of Mediterranean trade from the 11th to the mid-15th century emphasizes the predominance of western merchants and the commercial exchange of spices and eastern raw materials for western woollens and other finished products. The studies in this collection, the sixth by David Jacoby to be published in the Variorum series, adopt a different perspective. They underscore the economic vitality of various countries bordering the eastern Mediterranean, their industrial capacity, the importance of exchanges between them, and the important contribution of the merchants