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