The peaceful town of Peso da Régua, commonly known as Régua, overlooks the Douro River with the Serra do Marão mountains as a stunning backdrop. In 1756, the Marquês de Pombal proclaimed this city as the center of his newly demarcated wine region, and it has remained so since. As such, the town is steeped in the wine-making culture. This is particularly true at Casa do Douro, the headquarters of the Port Wine Institute. Its beautiful stained glass windows are a tribute in light and glass to the rich history of port wine and its cultural significance to the region.