Per Englunds samling av tags är en dokumentation av hur Stockholm ständigt är i förändring.
Our graffiti columnist linked up with XEME and YUMOH, who, by all accounts, are considered the most active and well-connected writers in the city.
Goldie, arguably the most famous drum 'n bass and jungle producer ever to do it, just launched a graffiti app called ARTA. He wants it to honour the tradition and history of tagging, while modernising its culture.
Norman Behrendt photographed some of Berlin's most prominent graffiti writers to comment on the duality of their lives.
Tagging anti-regime graffiti throughout the streets of Syria.