15th c.

England, a political and military ally, was periodically a thirsty customer, turning to Portugal for its wine supplies especially during frequent periods of conflict with France. The 1386 Treaty of Windsor gave rise to much trade in wine from the cool north west of Portugal to England, exported out of the port of Viana do Castelo (in the Vinho Verde country of today) – mostly, light, high-acid red wine.

Much wine was also exported from the Lisbon area. Throughout the coming centuries, Portuguese seafaring adventurers and traders established other markets in far-flung places for their native wines, as well as those of the islands of Madeira and the Azores.


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