Tadeusz Mazowiecki is chosen as the first non-communist prime minister in Central and Eastern Europe.

Tadeusz Mazowiecki was a Polish author, journalist, philanthropist and politician, formerly one of the leaders of the Solidarity movement, and the first non-communist Polish prime minister since 1946, having held the post from 1989 to 1991.

Communism is a sociopolitical, philosophical, and economic ideology within the socialist movement, whose goal is the creation of a communist society, a socioeconomic order centered on common ownership of the means of production, distribution, and exchange that allocates products in society based on need. A communist society entails the absence of private property and social classes, and ultimately money and the state.

A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but rather the head of government, serving as the chief of the executive under either a monarch or a president in a republican form of government.