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Pont de Pierre (Aosta)

Pont de Pierre
The single arched Pont de Pierre
Carries Connection Po Valley-Gaul
Crosses Buthier
Locale Aosta, Aosta Valley, Italy
Design Segmental arch bridge
Material Pudding stone, Roman concrete
Width 5.9 m
Longest span 17.1 m
Number of spans 1
Construction end Reign of Augustus (30 BC–14 AD)
Today bridge without water
Pont de Pierre is located in Italy
Pont de Pierre
Pont de Pierre

The Pont de Pierre (Italian: Ponte di pietra), meaning "Stone Bridge", is a Roman segmental arch bridge in the Italian city of Aosta in the Aosta Valley. The bridge crossed the Buthier about 600 m from the eastern exit of the Roman colony Augusta Praetoria; in later times the torrente changed its course, leaving the ancient bridge today without water.[1]

The single-arch bridge has a span of 17.1 m and a width of 5.9 m.[1] The arch vault consists of large voussoirs and shows a comparatively flat profile (span to rise ratio 3:1).[2] The facing was built of pudding stone, the spandrels filled with Roman concrete.[1]

The structure is dated to the second half of the reign of Augustus (30 BC–14 AD), who had earlier founded the military colony Augusta Praetoria at an important road junction (24 BC).[1] The Pont de Pierre was of particularly strategic importance, since in Aosta the transalpine routes to Gaul branched off into the Little St Bernard and the Great St Bernard Pass.[1] In southeasterly direction towards the Po Valley, the road led over another segmental arch bridge, the excellently preserved Pont-Saint-Martin Bridge, located at the exit of the Aosta valley.


  1. ^ a b c d e O’Connor 1993, p. 90
  2. ^ O’Connor 1993, p. 171


  • O’Connor, Colin (1993), Roman Bridges, Cambridge University Press, pp. 90 (I158), 171,  

See also

External links

Media related to at Wikimedia Commons

  • Pont de Pierre at Structurae
  • Traianus – Technical investigation of Roman public works

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