PFC Botev Plovdiv is known as "Bultras". Botev's eternal rival is the neighbouring city club of Lokomotiv Plovdiv, and both form the local Plovdiv derby. The two teams are the most supported ones in the second largest city in Bulgaria – Plovdiv – and the matches between them are well known to the Bulgarian football community, and also considered to be one of the fiercest rivalries in the world. Botev is the country's oldest continuously existing team, whereas Lokomotiv grew popular fanbase in the 70s. Traditionally, Lokomotiv's team drew support from the lower working class of society, whereas Botev's fanbase consisted mainly of
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.