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