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