Italian artist Filippo Minelli has a strong background in graffiti and worked for ten years in "urban communication" which means he took some of the very first steps and leaps towards as part of the international street art movement. (Although his art can't be classified as simply street art, as he takes it beyond that category.) You can trace his steps throughout Europe, South America, Africa, South-East Asia with stops at places like Kathmandu, Israel and Palestine. Much more than meaningless, scribbled words on bare walls, Minelli's pieces are thoughtful, thought-provoking and say a lot more than the few words he spells out. More at filippominelli.com.