The Ponte de São João or St John's Bridge, designed by engineer

Edgar Cardoso Edgar Cardoso (11 May 1913, Resende – 5 July 2000, Porto) was a noted Portuguese civil engineer and university professor. In Portugal, Edgar Cardoso was a pioneer of experimental analysis of structures and of high precision instruments develope ...

is a railway bridge in Portugal. It replaced the functionality of the still standing

Gustav Eiffel Alexandre Gustave Eiffel (born Bonickhausen dit Eiffel; ; ; 15 December 1832 – 27 December 1923) was a French civil engineer. A graduate of École Centrale des Arts et Manufactures, he made his name with various bridges for the French railway ...

wrought iron

Maria Pia Bridge The Maria Pia Bridge (in Portuguese ''Ponte de D. Maria Pia'', commonly known as ''Ponte de Dona Maria Pia'') is a railway bridge built in 1877, and attributed to Gustave Eiffel, situated over the Portuguese northern municipalities of Porto and V ...

in 1991.

References

{{DEFAULTSORT:Ponte de Sao Joao Bridges in Porto Bridges completed in 1991 Railway bridges in Portugal 1991 establishments in Portugal Bridges over the Douro River