- One of the most powerful Hungarian kings of all times. The three main sites of the square include the Hall of Art, built in 1896, the Museum of Fine Arts, inaugurated in December 1906, as well as the Millennium Monument, linking both buildings visually. All Rights Reserved. They symbolize Labor and Wealth, War plus Glory and Knowledge. Budapest is considered one of the most beautiful cities in Europe and is known as the "pearl on the Danube".