Through careful analysis of the Romanesque cathedral of Molfetta (in Apulia, southern Italy), Williams demonstrates how the commercial boom of the medieval Mediterranean changed the way churches were funded, designed, and built. The young bishopric of Molfetta, emerging in an economy of long-distance trade, competed with much wealthier institutions in its own diocese. Funding for the cathedral was slow and unpredictable. To adapt, the builders designed toward versatility, embracing multi-functionalism, change over time, specialization, and a heterogeneous style.