[custom_adv] Jews or Jewish people are an ethnoreligious group and a nation, originating from the Israelites and Hebrews of historical Israel and Judah. [custom_adv] Jewish ethnicity, nationhood, and religion are strongly interrelated, as Judaism is the ethnic religion of the Jewish people, while its observance varies from strict observance to complete nonobservance. [custom_adv] An exhibition, in the most general sense, is an organised presentation and display of a selection of items. In practice, exhibitions usually occur within a cultural or educational setting such as a museum, art gallery, park, library, exhibition hall, or World's fairs. [custom_adv] Exhibitions can include many things such as art in both major museums and smaller galleries, interpretive exhibitions, natural history museums and history museums, and also varieties such as more commercially focused exhibitions and trade fairs. [custom_adv] In British English the word "exhibition" is used for a collection of items placed on display, and the event as a whole, which in American English is usually an "exhibit". In both varieties of English each object being shown within an exhibition is an "exhibit". [custom_adv] Prague has been a political, cultural and economic centre of central Europe complete with a rich history. Founded during the Romanesque and flourishing by the Gothic, Renaissance and Baroque eras, Prague was the capital of the Kingdom of Bohemia and the main residence of several Holy Roman Emperors, most notably of Charles IV (r. 1346–1378).