Answer:
The fall of the Berlin Wall on 9 November 1989 further accelerated the demise of the Communist governments. In Czechoslovakia, the Opposition leader, Václav Havel, was unanimously elected interim President of the Republic by the parliament of the Socialist Republic on 29 December 1989. In the same vein, the anti-establishment Civic Forum movement won the first free parliamentary elections on 8 June 1990 and reappointed Václav Havel as President of the Republic in July of that year. In Hungary, the parliamentary elections held on 2 April 1990 resulted in the formation of the Democratic Forum government. On 9 December 1990, Lech Wałęsa became President of the Republic of Poland. In Bulgaria, a coalition government was formed on 7 December 1990, and a new Constitution was adopted on 9 July 1991. In Romania, following violent demonstrations, the Communist dictator Nicolae Ceauşescu was executed on 25 December 1989 and a new Constitution establishing pluralism was adopted on 8 December 1991.
