Ilya Khrzhanovsky’s immersive installation DAU, scheduled to open on October 12 as part of the Berliner Festspiele, was to include a mini-East Berlin, complete with a checkpoint requiring papers, bounded by a replica of part of the barrier that once divided East and West Berlin. The city government says that it has refused permission for the project because there’s not enough time to build it safely, but many locals argue that they’ve had quite enough of walls, thank you.