A nice cover from Czech Republic, depicting a single but very beautiful stamp celebrating the Castle of Prague. Prague Castle (Prazsky Hrad in czech) is a castle complex in the historical centre of Prague, built in the 9th. century. The Castle was a seat of power for kings of Bohemia, Holy Roman emperors and presidents of former Czechoslovakia. It's also the official office of the President of the Czech Republic.
The Castle is located at the Historical Centre of Prague, included at UNESCO's sites.