Become a member! Their newsletter has helpful and comprehensive information about a variety of topics, networking, funding, qualification. It is a great organization to be constantly in contact with. Subscribe to their newsletter, it is very informative!
Extra Tip: Check out regularly their “Freie Markt” Site
National Connection Base
A recognized professional association of theaters in Germany without their own ensemble, they connect organizers and ensembles. Not for newcommers. The ensembles need to have at least 5 performers. It has a database for spaces, guest productions, etc.