It’s not really common practice in ERA21 to dedicate a part of the issue to explaining its title. But in the case of the temporary use of public spaces and buildings, it becomes essential. First, we should define transitory, temporary and tactical approaches. But with a closer look, we find out that actually everybody knows them—remember that one place not far from the town centre that hasn’t been used for years, and now a group of locals started taking care of it and built a DIY skatepark or organized outdoor screenings?