Venus stadium. Opened in 1931, the venue had previously been in the property of Venus București, a club disbanded in 1949. After that ground's demolition through order of the Communist regime, Steaua played its home matches at any one of Bucharest's three largest multi-use stadia: ANEF, Republicii (built in 1926 and demolished in 1984 to make room for the erection of the Casa Poporului) and 23 August (built in 1953). Of these two, 23 August (later renamed Național) was mostly used when two matches between Bucharest clubs were scheduled in the same matchday or for important European matches, while Republicii for regular matches in the championship. From 1974 to 2015, Steaua played its home matches at the Stadionul Ghencea, a football stadium situated in South-Western Bucharest. Part of Complexul Sportiv Steaua, it was inaugurated on 9 April 1974 when Steaua played a friendly match against OFK Beograd, at which time it was the first football-only stadium ever built in Communist Romania, with no track & field facilities. The stadium was built through order of the Ministry of National Defence inside a former military base and was long used by CSA Steaua. The original capacity was 30,000 on benches. A general renovation occurred in 1991; this included installing seats, which dropped the capacity to 28,365. After a second renovation in 2006, Ghencea was able to host UEFA Champions League events, being a 'Category 3' arena according to the UEFA classification system. The Romania national team was also a tenant for numerous fixtures. From 2011, Steaua played European games and its most important domestic games at the newly constructed Arena Națională, and from March 2015, played exclusively at the Arena Națională. Support Steaua has the largest number of supporters of any team in Romania. A survey conducted in June 2007 suggested that the club accounts for approximately 42% of all Romanian football lovers, far greater than the teams ranked second and third, Dinamo București, with 12%, and Rapid București, with 9%. The largest concentration of fans are in Bucharest, notably in areas adjacent to the arena, covering the whole southern half of Bucharest, a city geographically divided by the Dâmbovița River. Also, the club has an important fan base inside the country, where several towns are renowned for counting vast majorities of Steaua supporters, and outside the borders, among Romanian emigrants. The Steaua Ultras movement began in 1995, when the bases of