An example is the city of Prague, the capital of the Czech Republic. Prague has built many new suburban roads since the fall of communism and also has an extensive metro and bus system, but because its central core is a UNESCO World Heritage Site, the city authorities limit new road construction in historic areas. Instead the tram system is the backbone of the transportation system, with many pre-communist and communist-era neighborhoods featuring brick and plaster walk-up apartment buildings lining roads that are served by several tram routes which run into the centre of the city. This is broadly similar to many mid-sized European cities.