Sergels torg

[ˌsærgəlsˈtɔrj], nicknamed Plattan ("the slab" or "the tile")

Stockholm's busiest city square. The black-and-white Harlequin concrete floor was laid in the 1960s, and while the design remains controversial, and the place used to have bad reputation for drug-dealing and violence, it attracts thousands of people daily for meet-ups, political demonstrations, flash mobs, and merchant stands. In 2018, a renovation was completed, reclaiming pedestrian space from car lanes.