The Alte Nationalgalerie (Former National Gallery) is an important museum in Berlin. It is located inside the so-called Museum Island, declared a UNESCO World Heritage Site, and houses one of the most important German collections entirely dedicated to 19th century painting. Originally, the museum was supposed to house the collection of art exhibited at the Akademie der Künste but after the Second World War the collection was dispersed. It was partially recovered and exhibited at the Neue Nationalgalerie, built for this purpose. For this reason the museum was renamed Alte, or ancient. The collection of paintings preserved in the Alte Nationalgalerie includes different artistic currents, from neoclassicism to Romanticism, from Biedermeier to French impressionism, with works by the main European artists of the century. There are masterpieces by Karl Friedrich Schinkel, Adolph Menzel (including "The iron mill"), Edouard Manet, Claude Monet, Auguste Renoir and Auguste Rodin. Of great importance are the works of the German artist Caspar David Friedrich, including the famous "Monaco by the sea".