of Bulgaria. Georgi Dimitrov was a member of the party's Central Committee from its inception in 1919 until his death in 1949, also serving as Bulgaria's leader from 1946. In 1938 the party merged with the Bulgarian Workers' Party and took the former party's name. Ruling party Following Dimitrov's sudden death, the party was led by Valko Chervenkov, a Stalinist who oversaw a number of party purges that met with Moscow's approval. The party joined the Cominform at its inception in 1948 and conducted purges against suspected "Titoites" following the expulsion of the Communist Party of Yugoslavia from the alliance. Suspected counter-revolutionaries were imprisoned. In 1948 the Bulgarian Social Democratic Workers Party (Broad Socialists) was forced to merge into the BKP, thus liquidating any left-wing alternative to the communists. In March 1954, one year after Joseph Stalin's death, Chervenkov was deposed. From 1954 until 1989 the party was led by Todor Zhivkov, who was very supportive of the Soviet Union and remained close to its leadership after Nikita Khrushchev was deposed by Leonid Brezhnev. His rule led to relative political stability and an increase in living standards. The demands for democratic reform which swept Eastern Europe in 1989 led Zhivkov to resign. He was succeeded by a considerably more liberal Communist, Petar Mladenov. On 11 December Mladenov announced the party was giving up its guaranteed right to rule. For all intents and purposes, this was the end of Communist rule in Bulgaria, though it would be another month before the provision in the constitution enshrining the party's "leading role" was deleted. Post-1990 The party moved in a more moderate direction, and by the spring of 1990 was no longer a Marxist-Leninist party. That April, the party changed its name to the Bulgarian Socialist Party (BSP). A number of hardline Communists established several splinter parties with a small number of members. One of these parties, named Communist Party of Bulgaria (Komunisticeska Partija na Balgarija), is led by Aleksandar Paunov. Headquarters The Party House (Партийния дом, Partiyniya dom) served as the headquarters of the Bulgarian Communist Party, located at the Largo. The Party House building was designed by a team under architect Petso Zlatev and was completed in 1955. Leaders Chairman of the Communist Party of Bulgaria General Secretaries of the Bulgarian Communist Party (1948–1990) Chairmen of the Bulgarian Communist Party (1990) Organizational structure Party congresses Congresses and national conferences adopt the