"Die Halle" has been closed permanently, meaning that all future acts for this venue will be cancelled or moved to a different location.
The german statement can be found here: http://powermetal.de/news/news-Die_Halle_in_Frankfurt_fuer_immer_geschlossen,24451.html

The Agathodaimon gig on Friday will still take place and will be the band's anniversary and the venue's funeral at the same time. A pity really, it's been a decent location and an essential piece of local live culture. Let's hope the owner can find a new location after good ol' German bureaucracy decided that Die Halle is unsuitable for live gigs seven years after it opened its gates...

The problem was that some reconstruction was necessary to increase safety and the person who runs the location agreed to that and wanted to modernize the location, but the owner did not allow any work on the building...
That's why it has to shut down

"Die Halle" is a nice concert location. I had a show with my band there in 2009. Too bad it had to be closed. The concert was organized by www.taunusmetal.de.