“Up until his death last Thursday, the 64-year-old left his tag—a simple smiley face—hundreds of thousands times on local walls, sidewalks, roofs and lampposts. Hamburg police spokeswoman Ulrike Sweden told me that detectives estimate that OZ painted 120,000 tags over a period of just a few years in the ’90s. No one kept track beyond that.
[…]He described his wanderings and travels during his 20s. He said he stopped off in Hamburg on the way to a hippie commune in Copenhagen just because he needed medical care. He never left.”