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
Church of the Holy Mother of God, Plovdiv 10 January 1860 the bishop of Plovdiv Paisius held a service in Bulgarian language and publicly announced that his congregation denounced the Greek Patriarch of Istanbul which became a great scandal and Plovdiv became the most radical center for the struggle of the autonomy of the Bulgarian Orthodox Church. On 30 April Paisius organized a Church and People's counsel in which the citizens were also represented in order to discuss the church question. Plovdiv sent a delegation to the Ottoman government asking officially for an autonomous Church. That Counsel was held annually until 1870 when the Bulgarian Exarchate was recognized