Chairman (President) of Bulgaria

The Chairman (President) of the Republic of Bulgaria (Bulgarian: Председателят (Президентът) на Републиката) was the head of state of Bulgaria from 3 April 1990 to 22 January 1992. The office was known as the Chairman (President) of the People's Republic of Bulgaria until the word "People's" was dropped from the country's name on 15 November 1990. From that point on, the office was simply the Chairman (President) of the Republic of Bulgaria.
Much like the State Council of Bulgaria superseded by it (which operated similarly to the Presidium of the Supreme Soviet of the Soviet Union), the office of Chairman (President) of Bulgaria was an executive post similar to the Presidency of the Soviet Union, as opposed to the modern Bulgarian presidency, which is ceremonial.
In 1971 a new constitution was approved by a referendum and came into force on 18 May 1971. In the constitution a new state organ was formed: the State Council. This new organ effectively eclipsed the role of the National Assembly as it had both legislative and executive power. The State Council could issue decrees with full legal authority when the National Assembly was not in session, with no provision for later approval by the full legislative body. The chairman of the State Council served as de facto head of state.
Following a wave of democratization in Eastern Europe in 1989, dictator Todor Zhivkov was forced to resign on 10 November, succeeded by Petar Mladenov. The following month the Communist Party announced it was giving up power and began a series of round table talks with the opposition on the transition to democracy. It was decided that the State Council would have to be abolished and the office of the Chairman (President) of the Republic would have to be inaugurated.
The powers and duties of the office were outlined in Chapter 5 of the 1971 constitution, as amended in 1990. They were broader than those of the modern-day President of Bulgaria, but not as broad as the State Council's before 1990.
The chairmanship (presidency) was an executive post similar to the presidency of the Soviet Union, which itself was based on a mixture of the US and French presidencies.
Prior to the creation of the post of Chairman (President), the de jure head of state of the People's Republic of Bulgaria was the chairman of the Presidium of the National Assembly under the 1947 Dimitrov Constitution, and later, the Chairman of the State Council of the People's Republic of Bulgaria under the 1971 Zhivkov Constitution, who was often called the "president" by western sources. For most of the PRB's existence, all effective executive political power was in the hands of the General Secretary of the Bulgarian Communist Party. The chairman of the Presidium of the National Assembly exercised largely symbolic and figurehead duties, but during the State Council's existence, the general secretaries serving at the time—Todor Zhivkov and Petar Mladenov—simultaneously served as State Council chairman during their time in office. In such a situation, the State Council was analogous to the current power structure in China, where the country's paramount leader serves as President, but derives his real power from his post as party leader.
The chairman (president) was elected by the National Assembly by a two-thirds majority, for the same term as the Assembly which elected him.
The chairman (president)'s powers were:
On 3 April 1990 Petar Mladenov, having previously served as the Chairman of the State Council, was elected as the first Chairman (President) of the Republic, serving until his resignation in July. His resignation came after a video surfaced suggesting the use of tanks against anti-government demonstration in December 1989.
Stanko Todorov was selected to serve as acting Chairman of the Republic until a successor could be chosen. He too, had to be replaced by another acting chairman, Nikolai Todorov, following his resignation for health reasons. Finally, on 1 August a compromise was reached and Zhelyu Zhelev, until then leader of the opposition party, the Union of Democratic Forces, was elected chairman. Zhelev was in office until he was sworn in on 22 January 1992 as President of Bulgaria, under the new constitution, following his direct election by the public three days before.