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 city; Plovdiv has three professional teams. The city has PFC Botev Plovdiv, founded in 1912 and PFC Lokomotiv, founded in 1926. Both teams are a regular fixture in the top Bulgarian league. The rivalry between them is considered to be even more fierce than the one between Levski and CSKA of Sofia. There are two other football clubs in the city – Maritsa FC (founded in 1921) and Spartak Plovdiv (1947). Plovdiv is host of the international boxing tournament "Strandzha" which has taken place since 1949. In 2007, 96 boxers from 20 countries participated in the tournament. There is