(Nohella)Czech Prague Castle, Mozart, Don Giovanni Opera at

Prague Castle (Czech: Pražský hrad; [ˈpraʃskiː ˈɦrat]) is a castle complex in Prague, Czech Republic, built in the 9th century. It is the official office of the President of the Czech Republic. The castle was a seat of power for kings of Bohemia, Holy Roman emperors, and presidents of Czechoslovakia. The Bohemian Crown Jewels are kept within a hidden room inside it.
According to the Guinness Book of Records, Prague Castle is the largest ancient castle in the world, occupying an area of almost 70,000 square metres (750,000 square feet), at about 570 metres (1,870 feet) in length and an average of about 130 metres (430 feet) wide. The castle is among the most visited tourist attractions in Prague attracting over 1.8 million visitors annually.
Don Giovanni (Italian pronunciation: [ˌdɔn dʒoˈvanni]; K. 527; complete title: Il dissoluto punito, ossia il Don Giovanni, literally The Rake Punished, namely Don Giovanni or The Libertine Punished) is an opera in two acts with music by Wolfgang Amadeus Mozart and Italian libretto by Lorenzo Da Ponte. It is based on the legends of Don Juan, a fictional libertine and seducer. It was premiered by the Prague Italian opera at the National Theater (of Bohemia), now called the Estates Theatre, on 29 October 1787. Da Ponte's libretto was billed as a dramma giocoso, a common designation of its time that denotes a mixing of serious and comic action. Mozart entered the work into his catalogue as an opera buffa. Although sometimes classified as comic, it blends comedy, melodrama and supernatural elements.
A staple of the standard operatic repertoire, Don Giovanni for the five seasons 2011/12 through 2015/16 was ninth on the Operabase list of the most-performed operas worldwide. It has also proved a fruitful subject for writers and philosophers.