Running from 6pm to 2am, this year approximately 80 official venues will be taking part.
The official website can be found here: http://www.lange-nacht-der-museen.de
Tickets cost 15 euros (or 10 euros with a concession) and children under 12 are free. The ticket also allows visitors to use the shuttle buses provided.
As always there will be a lot of fringe events running parallel to the more official museum programme. One such event which is well worth a visit is the open studio evening in the Gerichtshöfe Atelierhaus. 33 artists in this studio complex located in Wedding will be opening the doors of their studios also from 6pm to 2am. Further information can be found here: http://www.gerichtshoefe.de/