Todor Zhivkov

Todor Hristov Zhivkov ( ; 7 September 1911 – 5 August 1998) was the communist head of state of the People's Republic of Bulgaria (PRB) from March 4, 1954 until November 10, 1989.
Zhivkov was the longest-serving leader of any Eastern Bloc nation. He is one of the longest ruling non-royal leaders in history.