This beautiful bridge, which spans the Ria Douro, was designed by Théophile Seyrig, a disciple of Gustave Eiffel. It has multiple levels, and is open to Metro, foot and automobile traffic.
Gustave Eiffel is most famous for the Eiffel Tower in Paris. His mark, through his work and those of his students, can be felt throughout Portugal. Besides the Dom Luis I Bridge, the Maria Pia Bridge in Porto is an Eiffel work, as is the Eiffel Bridge in Viana do Castelo. The Santa Justa Lift in Lisbon was designed by Raoul Mesnier du Ponsard, a student of Eiffel’s.
Mostly True 