Todor Zhivkov

Todor Hristov Zhivkov was a Bulgarian communist politician who served as the de facto leader of the People's Republic of Bulgaria (PRB) from 1956 until 1989 as General Secretary of the Central Committee of the Bulgarian Communist Party. He was the longest-serving leader in the Eastern Bloc, the longest-serving leader within the Warsaw Pact and the longest-serving non-royal ruler in Bulgarian history.