The Grand Anti-Masonic Exhibition (German: Anti-Freimaurer-Ausstellung, Serbian: Анти-масонска изложба) was the name of an antisemitic exhibition that was opened on October 22, 1941 during World War II in Belgrade, the capital of the Nazi Germany-established Militärverwaltung in occupied Serbia.
Financed by the Germans and opened with the support of collaborationist leader Milan Nedić, it featured an estimated 200,000 brochures, 108,000 copies of nine different types of envelopes, 100,000 flyers, 60,000 copies of twenty different posters, and 176 different propaganda films that had previously been seen during The Eternal Jew exhibitions in Munich and Vienna in 1937. Despite nominally being anti-Masonic, its purpose was to promote antisemitic ideas and intensify hatred of Jews. Certain displays were intended to dehumanize the Jewish people and justify their extermination by the Germans. Others resembled anti-Jewish propaganda from the period of the Russian Empire and repeated the claims put forward in the book The Protocols of the Elders of Zion. The exhibition was organized by former members of the fascist movement known as Zbor and sought to expose an alleged Judeo-Masonic/Communist conspiracy for world domination through several displays featuring antisemitic propaganda.
Four stamps commemorating the exhibition were issued by Serbian collaborationist authorities in January 1942, depicting Judaism as being the source of all evil in the world and portraying a "strong and victorious Serbia triumphing over the plot of world domination." An estimated 80,000 people, including collaborationist leader Milan Nedić and some of his ministers, visited the exhibition prior to its closure on January 19, 1942.