Both the Azores and Madeira had been claimed by Portugal before the close of the second decade of the 15th century. By the close of the century, Bartholomew Diaz had rounded the Cape of Good Hope, Vasco da Gama had followed in his wake to reach Calicut on the Indian subcontinent, and Pedro Cabral had sighted the coast of South America. Following the first Columbus voyages to the New World, sponsored by Spain, territorial rivalry between two European powers went to arbitration: Pope Alexander VI adjudicated between the rival monarchies of Portugal and Spain, with Spain winning territory west of an imaginary longitudinal line drawn 370 leagues west of the Cape Verde Islands, an archipelago claimed by Portugal in 1447, so that today Brazil is Portuguese-speaking whereas the remainder of South America speaks Spanish.

Portugal was propelled in the course of that fateful 15th century from a poor country on the Atlantic fringe of a European continent that had known centuries of Mediterranean trade, to become a global maritime power that could turn its back on a Mediterranean commercial world that would slip slowly but inexorably into decline. Spain’s New World colonies traded in gold and silver, from great mines like Potosi; Portugal developed plantation agriculture based on African slave labor. Of the 11 million Africans transported from the Old World to the New, some four million were transported in Portuguese ships to Brazil. This compared with the half a million African slaves transported to eth American colonies. Since Columbus’ second voyage of settlement in 1493 there has been a massive exchange of flora and fauna between the Old World and the New; there are now two Africas on either side of the Atlantic Ocean, a phenomenon unique in human history.

The waters through which we have been sailing today have been wonderfully calm. At breakfast time a few of us were lucky enough to see a group of ten migrating great herons fly across our bow; we have looked down on migrating turtles and met a pod of dolphins. But half a millennium ago these waters witnessed momentous developments in human history, ushering in our increasingly globalized world. A series of presentations during the day reviewed the Portuguese world we have left behind us and prepared us for the climax of Semana Santa in Seville, our Spanish destination tomorrow.