A single arch is all that remains of Pons Aemilius, better known as Ponte Rotto (Broken Bridge), the first bridge in Rome to be built completely out of stone.
Pons Aemilius dates back to 179 BCE, but, over the course of time, it was rebuilt several times. In 1598 a catastrophic flood destroyed half of the bridge. This time it was not rebuilt, but abandoned for two hundred and fifty years. It came to be called Ponte Rotto (Broken Bridge).
In 1853 Pope Pius IX (r. 1846-78) had what was left of the bridge connected to the left bank of the river by an iron bridge.
In 1887 most of Ponte Rotto was destroyed in order to make way for Ponte Palatino (also known as Ponte Inglese), the work of the engineer Angelo Vescovali (1826-95).