"Porto (in English also Oporto), population 263,000 in 15 parishes, with about 1,600,000 in the Greater Metropolitan Area of Porto (continuous urban aglomeration), is Portugal's second city. Porto is the core of a large northern Atlantic conurbation and one of the most industrialised districts of Portugal.
One of Portugal's most internationally famous products, Port wine, was named after the city because it was originally shipped from the area or, more precisely, from Vila Nova de Gaia, a city just across the river which belongs to the same conurbation. The country was also named after the latin name of this city, Portus Cale (English: Port of Gaia)"