It is the oldest fully stone open-spandrel segmental arch bridge in the world.
From the en.wikipedia.org
The Romans also introduced segmental arch bridges into bridge construction.
From the en.wikipedia.org
In the center is the main entrance, recessed in another segmental arch.
From the en.wikipedia.org
It is built in red brick with ashlarsandstone dressings and consists of a single-span segmental arch.
From the en.wikipedia.org
A segmental arch is an arch that is less than a semicircle.
From the en.wikipedia.org
This bridge is also historically significant as it is the world's oldest open-spandrel stone segmental arch bridge.
From the en.wikipedia.org
The Zhaozhou Bridge built from 595 to 605 AD is China's oldest extant stone bridge, as well as the world's oldest fully stone open-spandrel segmental arch bridge.
From the en.wikipedia.org
They may be set within an arch or surmounted by a triangular or segmental pediment.