The City of Berlin actually features three World Heritage Sites: First, the Prussian Castles and Gardens of Potsdam and Berlin, wich are embedded in a inimitably created park landscape. Second, the Museumsinsel, a unique ensemble of museum buildings illustrating the evolution of modern museum design for over more than a centuary. The five museums in Berlin were built between 1824 an 1930. As the third site, the Berlin Modernism Housing Estates are inscribed. This property is an outstanding example of the building reform movement from the 1910 to 1933 that contributed to improving housing and living conditions for people with low incomes.