One of Berlin’s most outstanding sights is the Museum Island, located in the Spree River. With its ensemble of five museums, it is one of the most important museum complexes in Europe. Visitors interested in culture can visit five museums at once: the Old Museum, the New Museum, the Old National Gallery, the Bode Museum and the Pergamon Museum. They were built between 1830 and 1930 by five different architects on behalf of the respective Prussian kings. The entire complex has been included in the UNESCO World Heritage List since 1999.