Dom Luis I Bridge in Porto Connects two opposite banks of the Douro River. It is made of steel and has two floors. Its length is about 385 meters, and its mass is 3 045 tons. The bridge was named after the Portuguese king Louis I. It is often referred to as the most beautiful bridge in Porto and is one of its hallmarks. The bridge is perfectly visible from every part of the port, and it is specially illuminated at night. Pedestrian and car traffic takes place on both floors of the bridge, with a subway line on the upper floor.
The construction of the bridge began in 1881. At that time it was the longest bridge in its category. The ceremonial opening of the structure took place on October 31, 1886. The construction of the bridge was supervised by engineer Teofilo Seyring working for the Gustave Eiffel group.
Dom Luis I bridge is often compared due to its construction to a similar bridge called the Maria Pia Bridge in Porto.
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