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