The newly opened alchemical laboratories were discovered during the reconstruction of one of the oldest historical buildings in Prague on the street Haštalská number 1. This building is listed by UNESCO and by miracle this one has been preserved after the demolition of the Jewish quarter at the end of 19th century. Visitors have the first opportunity to see places, where alchemists produced elixir of eternal youth, Philosopher's Stone and non-precious metals changed into gold.