These could have been from anytime in the past two millennia.
The Pont du Gard is so old and classic, in the antiquities classic way, that I couldn’t resist giving a black and white conversion a try. If you’d like to compare, I posted it in color on my other web site: Real golden Arches: Pont du Gard.
I use the Gnu Image Manipulation Program (a.k.a., the GIMP) with the Nik plug in for the conversion. If you are interesting in using the GIMP for black and white I have a post about how to do it: Black and white digital photo processing using the GIMP.
Published for The Weekend in Black and White.