15. Gaia

Holding down the top spot on our 50 Greatest Street Artists Right Now list, Gaia impresses as much with his community action as he does with his art. Under his guidance, Open Walls Baltimore has blossomed into one of the premier street art projects. The event inspires local rejuvenation and provides a catalyst for international conversation. 

OWB's continued success and Gaia's new murals across the globe make him an obvious choice for this list.