The double-decker Dom Luis I bridge is an icon of the city of Porto. It spans the River Douro linking the Port wine houses of Vila Nova de Gaia with the bustling downtown Ribeira district of Porto. Construction took place between 1881 and 1886. The granite pillars of the original bridge are still in place, standing on the Ribeira like a pair of gate posts.
Porto, also known as Oporto, is the second largest city in Portugal, after Lisbon. It is the capital of the Porto District and one of the Iberian Peninsula's major urban areas. Porto's metropolitan area has around 1.8 million people (2023).