The Key Hunt

For centuries, the chest of the Prussian crown insignia has been locked with 19 locks. No one has ever managed to open it. Oranienburg goes in search of the key and rediscovers its town founder Louise Henriette and mother of the first Prussian king.
Scenes and installations distributed around the city tell of the mysterious White Lady, a royal alchemist who is supposed to reduce the national debt by making gold, tulpomania and the Thirty Years' War...

Theater Anu creates a theatre GAME for the whole family with this city production: Only those who find all 18 keys hold the 19th key in their hands. The "participant card" changes during the production so that it shows a cardboard key at the end.