the Pont du Gard was built to serve as an aqueduct (a bridge with a built-in canal to bring fresh water in another place) for a Roman colony in Nîmes, southern France.
People aren't sure who built it, we used to think it was Marcus Vipsanius Agrippa in 19 BC, but now new excavations say mid 1st century and we don't know who would build it then. I have to write a...