Nitra is home to several museums and galleries. The Museum of the Nitra Region supervises collection objects on several fields (Archaeology, Ethnography, Numismatics, Geology and Zoology). Since 1993, it has also an exhibition of the most precisious artifacts discovered by the Archeological Institute in Nitra. The exhibition contains more than 2,200 gold, silver and other objects, among them golden-plated plaques from (pre-)Great Moravian hillfort Bojná. The Diocesan Museum of the Nitra Diocese on the Nitra Castle exhibits the facsimile of documents and archaeological discoveries closely connected to the origin of Christianity in Slovakia, including the oldest manuscript from the territory of Slovakia (the Nitra Gospel Book, 1083). Open-air museum "Osada Lupka" is a reconstruction of Slavic village from early Middle Ages. The Slovak Agricultural Museum specializes on the history of agriculture and is the only one of its kind in Slovakia. The museum has also open-air exposition (skanzen). The Mission Museum of Nations and Cultures exhibits objects from missionary activities. The Museum of Jewish Culture in the synagogue presents culture and history and has a permanent exposition dedicated to the Holocaust.