List of longest masonry arch bridge spans

Because they are made of worked stone, there is a slight chance they might even stand without mortar, like the Pont du Gard aqueduct.

In a closed spandrel stone arch bridge the hollow space can be filled with rubble and loose material.

If the voussoir stones are thin they cannot take much weight so instead it is the concrete filling that becomes the structural part of the arch.

The Maidenhead Railway Bridge may have the two longest arches made of bricks, 39 metres (128 ft).

Building new masonry arch bridges today is a solely Chinese business.