This 10CD box covers the entire range of the repertoire with which Boris Christoff took the world by storm; from his first opera role in La Boheme over the important Verdi roles and his devilish portrayal of Mephisto to the major roles in Russian operas; Christoff took part in no less than 600 performances of Boris Godunov.

Prince Igor is an opera in four acts with a prologue, written and composed by Alexander Borodin. The composer adapted the libretto from the early Russian epic The Lay of Igor's Host, which recounts the campaign of the 12th-century prince Igor Svyatoslavich against the invading Cuman ("Polovtsian") tribes in 1185. He also incorporated material drawn from two medieval Kievan chronicles. The opera was left unfinished upon the composer's death in 1887 and was edited and completed by Nikolai Rimsky-Korsakov and Alexander Glazunov. It was first performed in St. Petersburg, Russia, in 1890.

Giulio Cesare in Egitto (Julius Caesar in Egypt, HWV 17), commonly known simply as Giulio Cesare, is an Italian opera in three acts written for the Royal Academy of Music by George Frideric Handel in 1724. The libretto was written by Nicola Francesco Haym who used an earlier libretto by Giacomo Francesco Bussani, which had been set to music by Antonio Sartorio.