The Maria Pia Bridge crosses the river Douro located in the city of Porto in Portugal. The bridge was opened in 1877 by the king of Portugal and is named for Queen Maria Pia, who lived from 1847 to 1911.
Gustave Alexandre Eiffel was given the task of constructing the bridge. He is best known for the Eiffel Tower, but was also a skilled bridge engineer. The bridge is similar in appearance to the Dom Louis I Bridge which is just a little ways down the river.
