The Venetian Republic reached its zenith in the dramatic takeover of “a quarter and a half a quarter” of the Byzantine Empire in the Fourth Crusade. It acquired a network of port cities – the Stato da Mar – that enabled its control over trade routes between Europe, Asia, and the Middle East. Called the “hinge” of Europe by one historian, Venice spearheaded an economic leap forward on the continent through a mastery of long-distance navigation. This was Italy’s second great urban age, as cities saw resurgences from the dramatic declines into feudalism in late antiquity. Venice was the prototypical world city of the time, competing with Genoa for control of seaborne trade routes. Indeed, the activities in Italian city-states are critical to the scholarly understanding of the European economic revivals in the ninth and eleventh centuries. The city figures centrally in major works by Janet L. Abu-Lughod, Michael McCormick, Henri Pirenne, and Fernand Braudel for fostering seminal forms of intercity relations at crucial times. Its relations with Constantinople, for example, were of equal importance with those of its Italian neighbors.