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
PFC Lokomotiv Plovdiv Another merger follows in 1945 with the "Catholic" club "Parchevich". After this wave of mergers, like many others in the country, the club is renamed to an abbreviation of the biggest clubs merged - the new name is "S.P.-45", meaning "Sportclub Parchevich - 1945". However, because of the "Western" phrasing ("sport" and "club" are non-Slavic words) the team is renamed again before the start of the season - the name of the club becomes ""Slavia" Plovdiv". In 1947 a new wave of consolidations of the sport organisations in the country sees Slavia Plovdiv merge with the team of the cooperative