Plovdiv municipal triangle of Plovdiv, including Maritsa municipality and Rodopi municipality. Population of Plovdiv: At the first census after the Liberation of Bulgaria in 1880 with 24,053 citizens, Plovdiv is the second largest city behind Ruse, which had 26,163 citizens then, and ahead of the capital Sofia, which had 20,501 citizens then. As of the 1887 census, Plovdiv was the largest city in the country for several years with 33,032 inhabitants compared to 30,428 for Sofia. According to the 1946 census, Plovdiv was the second largest city with 126,563 inhabitants compared to 487,000 for the capital. In its ethnic character Plovdiv
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.