I found out today, that yesterday was the opening of PROP4G4ND4's posters exhibition @ French Institute in Athens (Sina 31, Kolonaki, tel: 210 33 98 600).
The exhibition will be open until the 28th of February during these hours:
Monday to Friday >>> 09:00 - 20:00
Saturday >>> 09:00 - 14:00
The entrance is free!
More info @ the official site of the institute.
I'm going to visit the exhibition, too! His works are great!