French middle school mathematics book. What is the proportion of white tiles ?
(Thanks Astik).
A selection of pieces by Spogo from Barcelona.
2nd part of the serie “3x3x3″ by Zonenkinder: 3 photographer from Hamburg, 3 questions, 3 favourite shots of streetart. This time Bildpixel.
Italian trains (Ciao above) + geometric stuff from Simek & Elian.