Lviv is a city in western Ukraine. The city is regarded as one of the main cultural centres of today's Ukraine and historically also for Ukraine’s neighbour, Poland, as the city before WWII and the following population transfers was the second most important Polish cultural centre. The historical heart of Lviv with its old buildings and cobblestone roads has survived World War II and ensuing Soviet presence largely unscathed. The city has many industries and institutions of higher education such as the Lviv University and the Lviv Polytechnic. Lviv is also a home to 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 city centre in September 2006.