If you've seen Miloš Forman's film Amadeus, you've seen the Estates. This Baroque gem, which appears to be made from marzipan, was where Mozart's La Clemenza di Tito and Don Giovanni premièred, with the composer conducting. Today, it's one of the three performance venues under the National Theatre's umbrella. Opera is still performed here, along with dance and drama. Although the opera offers surtitles in English and German, plays are very rarely accompanied by translations.