Since 1990, Bulgaria has an unstable party system, in the past two decades differently dominated by the post-communist Bulgarian Socialist Party or by the right Union of Democratic Forces and recently by the new right-oriented party-Citizens for European Development of Bulgaria.

After the fall of the communism in 1990, the former communist party changed to Bulgarian Socialist Party ( BSP ) and won the first post-communist elections for the new constitution in 1990 with a small majority.

The second president was another member of the Union of Demicratic Forces-Petar Stoyanov and served until 2002, when the leader of the Bulgarian Socialist Party-Georgi Parvanov began to replace him, he won two mandates and served until 2011, when Rosen Plevneliev of the right-oriented GERB was elected for a five-year mandate.

Their government collapsed in late 1992, and was succeeded by a technocratic team, put forward by the Bulgarian Socialist Party ( BSP ), which served until 1994, when the president dissolved the government and appointed a provisional one to serve until the pre-term elections, appointed for December in the same year.

Unlike the communist parties in most other East European states, the BCP ( changing its name to Bulgarian Socialist Party ) retained majority power after the transition in Bulgaria by winning the first free national elections in June 1990.

During 1996, however, the economy collapsed due to the Bulgarian Socialist Party's slow and mismanaged economic reforms and an unstable and decentralised banking system, which led to an inflation rate of 311 % and the collapse of the lev.

Chernenko was awarded the Order of the Red Banner of Labour, 1976, in 1981 and in 1984 he was awarded Hero of the Socialist Labour: on the latter occasion, Minister of Defence Ustinov underlined his rule as an " outstanding political figure, a loyal and unwavering continuer of the cause of the great Lenin "; in 1981 he was awarded with the Bulgarian Order of Georgi Dimitrov and in 1982 he received the Lenin Prize for his " Human Rights in Soviet Society.

He resigned at the PES Progressive Convention of Brussels on 24th November 2011, and was replaced by Sergei Dmitrievich Stanishev, chairman of the Bulgarian Socialist Party ( BSP ), elected PES Interim President, by acclamation, by the PES Presidency.

** First round of the Bulgarian Constitutional Assembly election sees the Bulgarian Socialist Party win a majority.

* August 26 – In Sofia, protestors set fire to the headquarters of the governing Bulgarian Socialist Party.

* October 13 – In the Bulgarian parliamentary election, the Union of Democratic Forces defeats the Bulgarian Socialist Party, leaving no remaining Communist governments in Eastern Europe.

** After 45 years of Communist rule in Bulgaria, Bulgarian Communist Party leader Todor Zhivkov is replaced by Foreign Minister Petar Mladenov, who changes the party's name to the Bulgarian Socialist Party.

* Bulgarian Socialist Party

According to Bulgarian law, a Bulgarian president is not allowed to be a member of a political party, thus Parvanov is independent and he left the Socialist Party after his success in the presidential elections, although he identified as a socialist, Parvanov often declares being a ' social president '.

* Member of the Bulgarian Communist Party since 1981 ( renamed to Bulgarian Socialist Party, BSP in 1990 )

* Bulgarian National Socialist Party ( Bulgarian, anti-Semitic )

The Bulgarian Socialist Party (, БСП ; Bulgarska sotsialisticheska partiya, BSP ) is a social-democratic political party in Bulgaria and successor to the Bulgarian Communist Party.

From the end of World War II until the widespread change of regime in Eastern Europe in November 1989, the Bulgarian Communist Party ( BCP ) exerted complete economic, social and political control in Bulgaria.

Some communist activists managed to activate a guerrilla movement headed by the underground Bulgarian Communist Party.

A resistance movement called Otechestven front ( Fatherland front, Bulgarian: Отечествен фронт ) was set up in August 1942 by the Communist Party, the Zveno movement and a number of other parties to oppose the elected government, after a number of Allied victories indicated that the Axis might lose the War.

After his electoral defeat in 1874, Gladstone resigned as leader of the Liberal Party, but from 1876 began a comeback based on opposition to Turkey's Bulgarian atrocities.

** The National Assembly of Bulgaria votes to end one party rule by the Bulgarian Communist Party.

** Todor Zhivkov is re-elected as the leader of the Bulgarian Communist Party.

* Bulgarian Communist Party, the communist and Marxist-Leninist ruling party of Bulgaria from 1946 until 1990 when the country ceased to be a communist state

** Bulgaria ( Bulgarian Communist Party ) 1946-1990

He became First Secretary of the Bulgarian Communist Party in 1954 and remained on this position for 35 years, until 1989, thus becoming the longest-serving leader of any Eastern Bloc nation, and one of the longest ruling non-royal leaders in history.

In 1928, he joined the Bulgarian National Youth Union ( BSNM ), an organisation closely linked with the Bulgarian Workers Party ( BRP ) – later the Bulgarian Communist Party ( BKP ).

* January 19 – The Bulgarian presidential election is won by Zhelyu Zhelev, leader of the Union of Democratic Forces.

He won the respect and love of the Bulgarian people who witnessed his labors on their behalf.

In 1410 he was defeated and killed by his brother Musa, who won the Ottoman Balkans with the support of Byzantine Emperor Manuel II, Serbian Despot Stefan Lazarevic, Wallachian Voievod Mircea, and the two last Bulgarian rulers ’ sons.

Bulgaria won 3 – 1 on penalties with Mihaylov becoming the hero for the Bulgarian team.

He won the Bulgarian Footballer of the Year award in 2003 when he was playing for Celtic.

With his new club, he won the Bulgarian Championship in 1997 and the national cup in 1997 and 1999.

* In the Bulgarian parliamentary election, 1997 the Coalition won 49, 2 % of the popular vote and 139 out of 240 seats.

* In the Bulgarian parliamentary election, 2001, the coalition won 18. 2 % of the popular vote and 51 out of 240 seats.

* In the Bulgarian parliamentary election, 2005, the coalition won 7, 7 % of the popular vote and 20 of 240 seats

It played against FC Santa Coloma of Andorra and won both games, but was later knocked out by Bulgarian side PFC Levski Sofia.

To date, Litex has won the championship four times and has won the Bulgarian Cup four times.

In the recent years, Litex won the Bulgarian Cup four times, in 2001 ( a 1: 0 win against Velbazhd Kyustendil after extra time ), in 2004 ( a win over CSKA after a 2: 2 in the regular time and a penalty shootout ), in 2008 a win over Cherno More Varna ( 1: 0 ) and in 2009 against Pirin Blagoevgrad ( 3: 0 in the regular time ).

The game ran on high emotions fueled by the streak of consecutive victories of Levski over CSKA in the 2 years prior to the game ( though CSKA won the Bulgarian Cup game 2-1 ).

Levski Sofia is the only Bulgarian club which has won the European Champions ' Cup in two different team sports – basketball and volleyball.

In October 2010 Maleeva won the Bulgarian national outdoor championship, becoming the youngest and the oldest player to have won it, within 22 years.

He returned to Bulgaria with Litex Lovech, and won Bulgarian league title with them in 1998 and 1999.

Since its establishment, the football section of the sports club has won the championship once and has been a runner-up for the Bulgarian Cup competition twice.

In 1961, as a finalist in the Bulgarian Cup, Spartak won the right to play in the UEFA Cup Winners ' Cup.

He captained the Bulgarian national team from 2006 to 2010, and is its all-time leading goalscorer and has also won the Bulgarian Footballer of the Year a record seven times, surpassing the number of wins by Hristo Stoichkov.