P. Vladigerov
Tzar Kaloyan Opera, Act III, Scene I
Reni Penkova, Aleksandar Vladigerov, Sabin Markov, Sofia National Opera Orchestra, Maria Ventsislavova
Tsar Kaloyan, Act III, Scena II
Boris Bogdanov, Sabin Markov, Reni Penkova, Maria Ventsislavova, Evgenia Babacheva, Milen Paounov, Sofia National Opera Orchestra, Sofia National Opera Chorus, Lyuben Mihailov, Zhivko Pranchev, Alexander Vladigerov, Boyan Katsarski