Bar Code, originally uploaded by domar.
Milky Way Mosaic on Flickr – by domar
Milk Gun Mosaic on Flickr – by domar
Sun Mosaic on Flickr – by domar
Funny Dog Mosaic on Flickr – by domar
Squares Mosaic on Flickr – by domar
Pretty Girl Mosaic on Flickr – by domar
These mosaic murals are on walls around a dairy here in Milan, Italy. Artists are various and once a year the schools of Milan can participate in a public concourse. The best mosaics manufactured by the school children are then exhibited for one year aside these permanent mosaics.
Thanks again for sharing your photos & for the added info Marcello 🙂
Mosaic Art Source 
Who manufactured the mosaics shown in the pictures? We do the same type of mosaic (opus-regulatum) using a custom robotic assembly system. We give our software away for free and have worked with some schools to have the children design the mosaics using the software, then use our robotic system to do the tedious assembly.