The production of port wine in the Douro Valley region of Portugal began around 1200 AD, marking the inception of a significant industry that would become renowned worldwide. This early fortified wine production was driven by the region's unique climate and geography, which were ideal for grape cultivation. The establishment of port wine production not only contributed to the local economy but also laid the groundwork for Portugal's global reputation in the wine industry.

The beginning of Portuguese port wine production in 1200 contributed to maritime trade imagery in Iberian poetry, influencing poets like Luís de Camões and later English literary references to fortified wines in works by John Milton. The rich cultural associations of port wine became a symbol of national identity and celebration in poetic traditions.