Bulgaria

Bulgarian writer and poet, known as "the Patriarch of Bulgarian literature," whose works chronicled the Bulgarian Renaissance and Post-Liberation epochs, and who also served as Education Minister

King of Bulgaria and a skilled military officer who also held the unique profession of a train driver

Nobel Prize-winning Bulgarian-born Swiss and British Jewish modernist writer known for his novels, plays, and non-fiction works

Macedonian atomic physicist and academician known for his extensive contributions to theoretical and nuclear physics with an h-index of 38 and 346 published papers

Bulgarian communist politician and statesperson who served as General Secretary of the Bulgarian Communist Party and de facto leader of the People's Republic of Bulgaria from 1956 to 1989, holding the record as the longest-serving non-royal ruler in Bulgarian history

Swiss astronomer and physicist who first posited the existence of dark matter and introduced the concept of supernovas and neutron stars