Nazi plunder (Raubkunst) was the stealing of art and other items which occurred as a result of the organized looting of European countries during the time of the Nazi Party in Germany. The looting of Jewish property beginning in 1933 in Germany was a key part of the Holocaust. Nazis also plundered occupied countries, sometimes with direct seizures, and sometimes under the guise of protecting art through Kunstschutz units. In addition to gold, silver, and currency, cultural items of great significance were stolen, including paintings, ceramics, books, and religious treasures. Many of the artworks looted by the Nazis were recovered by the Allies' Monuments, Fine Arts, and Archives program (MFAA, also known as the Monuments Men), following the war; however many of them are still missing or were returned to countries but not to their original owners. An international effort to identify Nazi plunder which still remains unaccounted for is underway, with the ultimate aim of returning the items to their rightful owners, their families, or their respective countries. Adolf Hitler was an unsuccessful artist who was denied admission to the Vienna Academy of Fine Arts. Nonetheless, he thought of himself as a connoisseur of the arts, and, in Mein Kampf, he ferociously attacked modern art as degenerate, including Cubism, Futurism, and Dadaism, all of which he considered the product of a decadent 20th-century society. In 1933 when Hitler became chancellor of Germany, he enforced his aesthetic ideal on the nation. The types of art that were favored among the Nazi party were classical portraits and landscapes by Old Masters, particularly those of Germanic origin. Modern art that did not match this was dubbed degenerate art by the Third Reich and all that was found in Germany's state museums was to be sold or destroyed. With the sums raised, the Führer's objective was to establish the European Art Museum in Linz. Other Nazi dignitaries, like Reichsmarschall Hermann Göring and Foreign Affairs minister von Ribbentrop, were also intent on taking advantage of German military conquests to increase their private art collections.