History of Plovdiv Berlin which divided the newly liberated country into several parts. It separated the autonomous region of Eastern Rumelia from Bulgaria and Plovdiv became its capital. In three month the Ottoman Empire created an Organization Chart (Constitution) of the province and appointed a governor. At the time, it had a population of about 33,500, of which 45% were Bulgarians, 25% Greeks, 21% Turks, 6% Jews and 3% Armenians, a situation that changed rapidly in the following decades. In the spring of 1885 Zahari Stoyanov formed the Secret Bulgarian Central Revolutionary Committee in the city which actively conducted propaganda for the unification
Plovdiv Arts; and others. The 2009 International Olympiad in Informatics (IOI) was held at the University of Plovdiv "Paisiy Hilendarski", between 8 and 15 August 2009. The 2009 IOI Honorary Patron was Bulgarian President Georgi Parvanov. Between 1875 and 1906, the Zariphios School was one of the local Greek educational institutions that provided elementary and secondary education. Plovdiv Sports Complex consists of Plovdiv Stadium with several additional football fields, tennis courts, swimming pools, a rowing base with a 2 km-long channel, restaurants, and cafés in a spacious park in the western part of the city just south of the Maritsa river.