News: two Portuguese architects want to transform Porto's iconic Maria Pia Bridge, built in 1877 by Gustave Eiffel, into a monument by moving the disused structure from its present location on the River Douro to the city centre. Designed by the French engineer of Eiffel Tower fame, the wrought-iron railway bridge has been out of use since 1991. However, as one of Porto's most recognisable structur