This third volume by David Abulafia looks at the interactions between territories, peoples and religions across the Mediterranean, and at the influence of the Mediterranean economy on the world beyond. Topics addressed are trade across the Christian-Muslim frontier; the relative importance of local and long distance trade in economic development; the policies of Frederick II and his successors towards the Jews and Muslims; and the complex political relationships within the western and central Mediterranean in the aftermath of the revolt of the Sicilian Vespers. Attention is also paid to Italian merchants and bankers as far afield as London and Southampton, and to the business affairs of Lorenzo de'Medici. Taken together, these papers present an original, Mediterranean, perspective on the economy, society and politics of central and late medieval Europe.