Luís I Bridge

Brief information

The Dom Luís I Bridge has two working levels: one almost at the water, the other high above the Douro. So it is not simply thrown across from one bank to the other, but connects different levels of two cities at once — Porto and Vila Nova de Gaia. The lower deck links the Ribeira district with the cellars and wine warehouses on the opposite bank; the upper one links the upper district of Porto near São Bento station with the upper part of Vila Nova de Gaia.

The bridge was built in 1886 to a design by Théophile Seyrig, a pupil and partner of Gustave Eiffel. This connection matters not because of the famous surname, but as a key to the structure’s appearance: the metal arch and open construction work visibly, without a stone shell. Later, the upper deck changed its role: since 2003 it has been closed to cars and used by the Porto Metro light rail and pedestrians.

What to notice first

It is worth comparing the arch and the two decks. The main metal arch supports a span 172 metres long and rises 44.6 metres; because of this, the bridge reads as an engineering structure in which support, weight, and distance are shown almost openly. The total length of 385.25 metres and weight of 3,045 tonnes help convey the scale, but it is more important to see how the long crossing is assembled around one large curve.

The lower level runs just above the surface of the water and explains the connection with Ribeira, the cellars, and the wine warehouses. The upper level should be read separately: it connects not the quaysides, but the upper parts of the cities. The change in transport on it is also noticeable as a fact of the bridge’s arrangement: the former roadway is now given over to the metro tram and pedestrians. One bridge shows three things at once — the relief of the banks, a nineteenth-century industrial metal structure, and a later reconfiguration of urban movement.