Plovdiv 40,000 objects. The Museum of Natural Science was inaugurated in 1955 in the old edifice of the Plovdiv Municipality built in 1880. It is among the most important museums in the country with rich collections in its Paleontology, Mineralogy, and Botanic sections. There are several rooms for wildlife and it contains Bulgaria's largest freshwater aquarium with 40 fish species. It has a collection of minerals from the Rhodope mountains. The Museum of Aviation was established on 21 September 1991 on the territory of the Krumovo airbase to the southeast of the city. The museum possesses 59 aircraft and indoor and
Plovdiv the Turks and Greeks. Prior to the population exchange, as of 1 January 1885, the city of Plovdiv had a population of 33,442, of which 16,752 were Bulgarians (50%), 7,144 Turks (21%), 5,497 Greeks (16%), 2,168 Jews (6%), 1,061 Armenians (3%), 151 Italians, 112 Germans, 112 Romani people, 80 French people, 61 Russians and 304 people of other nationalities. The vast majority of the inhabitants are Christians, mostly Eastern Orthodox, Catholics, Eastern Catholics, and Protestant trends (Adventists, Baptists and others). There are also some Muslims and Jews. In Plovdiv there are many churches, two mosques and one synagogue (see Plovdiv