Nearly a century after it was first published in 1925, remains one of the most provocative works of medieval history ever written. Here, Henri Pirenne argues that it was not the invasion of the Germanic tribes that destroyed the civilization of antiquity, but rather the closing of Mediterranean trade by Arab conquest in the seventh century. The consequent interruption of long-distance commerce accelerated the decline of the ancient cities of Europe. Pirenne challenges conventional wisdom by attributing the origins of medieval cities to the revival of trade, tracing their growth from the tenth century to the twelfth. He also describes the important role the middle class played in the development of the modern economic system and modern culture. Featuring a new introduction by Michael McCormick, this Princeton Classics edition of is essential reading for all students of medieval European history.