Congress Square () is one of the important centres of the city. It was built in 1821 for ceremonial purposes such as Congress of Ljubljana after which it was named. Since then it has been a centre for political ceremonies, demonstrations, and protests, such as the ceremony for the creation of the Kingdom of Yugoslavia, ceremony of the liberation of Belgrade, and protests against Yugoslav authority in 1988. The square also houses several important buildings, such as the University of Ljubljana Palace, Philharmonic Hall, Ursuline Church of the Holy Trinity, and the Slovene Society Building. Star Park () is located in the centre of the square. In 2010 and 2011, the square was renovated and is now mostly closed to road traffic on ground area, however, there are five floors for commercial purposes and a parking lot located underground.