Manhole covers

http://manhole-covers.net/galerie/slide.php3?f=0
"These manhole covers have been prior chosen for their esthetic interest. So, this galerie doesn't pretend to be an exhaustiv view of french old patterns. Models slightly similars or without visual attraction are simply not shown yet.
The city name mentionned for each, is the name of the place where the picture has been taken
Some of these models have been removed since I made these pictures, during the 80's, and can't be seen anymore in situ."