Lviv is the largest city in western Ukraine and the seventh largest city in the country overall, with a population of around 728,350 as of 2016. Lviv is one of the main cultural centres of Ukraine. Named in honor of the Leo, the eldest son of Rus King Daniel of Galicia, it was the capital of the Kingdom of Galicia–Volhynia from 1272 to 1349, when it was conquered by King Casimir III the Great who then became known as the King of Poland and Rus. From 1434, it was the regional capital of the Ruthenian Voivodeship in the Kingdom of Poland and was known as Lwów. In 1772, after the First partition of Poland, the city became the capital of the Habsburg Kingdom of Galicia and Lodomeria and was renamed to Lemberg. In 1918 in a short time was the capital of the West Ukrainian Peoples Republic. Between the wars, the city was known again as Lwów and was the centre of the Lwów Voivodeship in the Second Polish Republic. After World War II, it became part of the Soviet Union and in 1991 of independent Ukraine. Administratively, Lviv serves as the administrative center of Lviv Oblast and has the status of city of oblast significance. Lviv was the centre of the historical region of Galicia. The historical heart of the city, with its old buildings and cobblestone streets, survived Soviet and German occupations during World War II largely unscathed. The city has many industries and institutions of higher education such as Lviv University and Lviv Polytechnic. Lviv is also the home of many world-class cultural institutions, including a philharmonic orchestra and the famous Lviv Theatre of Opera and Ballet. The historic city centre is on the UNESCO World Heritage List. Lviv celebrated its 750th anniversary with a son et lumière in the centre of the city in September 2006.