The Historic Centre of Vienna has also maintained its characteristic skyline. In addition to the architectural elements, the Historic Centre of Vienna has retained its role as the music capital of Europe. The historic urban fabric of the Historic Centre of Vienna is thus informed by this ongoing interchange, which has caused the urban landscape to evolve and grow over time, reflected in the new, emerging skyline outside the buffer zone. Various legal instruments at both federal and municipal/provincial levels protect the Historic Centre of Vienna and its buffer zone. The Management Plan, which was elaborated in 2002, refers to the two World Heritage properties in Vienna (Historic Centre of Vienna, and Palace and Gardens of Schönbrunn).