That is certainly the greatest architectural and acoustic treasure of this house: proximity. In Achim Freyer's production of “Hansel and Gretel” you sit inside a child's heart. It is a dark room of dreams and lust, of fear and wishes, of a fantasy that gives birth to the monstrous: a garden spider as God in heaven, a giant cat with white mice sticking to its tongue, and a witch with sausage lips and a coffee cup hat.