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Viaduct
Viaduct
The Old bridge – in common parlance – was built between 1859 and 1861 to cross the Pétrusse valley at a height of 45 metres. It consists of 24 arches spanning either 8 or 15 metres and of pillars up to 30 metres high. The total length is 290 metres whereas the slight curve in the middle is the result of military and strategic considerations.