Secret Vienna:A magnificent private palace that can be visited by reservation, a crocodile mummy in a private library, a chocolate house, an alchemical ceiling in Schoenbrunn, one of the most beautiful pharmacies in the world, an exceptional Art Nouveau church, the tomb of a fish that would have converted to Judaism, a jazz museum in public toilets, a public dump that can be visited like a museum, the oldest organ in Vienna hidden behind a painting, an empress