- ... that the currently abandoned Old High School of Music (pictured) in Rousse, Bulgaria has previously housed a primary school, a junior high school, a university, and a trade school?
- ... that goaltender Konstantin Mihailov played in 28 Ice Hockey World Championships with the Bulgarian national team until the age of 49?
- ... that Bulgaria's first cosmonaut, Georgi Ivanov, safely returned to Earth despite a failing main engine and a damaged backup engine on his Soyuz 33 spacecraft?
- ... that Spas Wenkoff, first a tenor at a Bulgarian amateur theatre, appeared as Tristan at the Staatsoper Dresden, and was then invited to sing the role at the centenary Bayreuth Festival?