For several years, street art actions around the globe have been making headlines. More and more of these markings by individuals or groups can be seen on the surfaces of cities. They transform empty or sterile places and streets into vibrant, colorful galleries. Street art is a controversial and hotly debated topic. Street artists distribute their marks unsolicited and free of charge within the urban landscape. In contrast, urban planning places the highest value on monitored and clean spaces. "Street Art: The City as a Playground" thoroughly explores the topic of street art, which has previously only been addressed in photographic documentation. Here, many well-known artists provide insight into their motivations, their workshops, and their practical work for the first time.