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