Russian Romantic composer Alexander Porfiryevich Borodin wrote the opera Prince Igor, with four acts with a prologue which contains the Polovtsian Dances, often performed as a stand-alone concert work forming what is probably Borodin's best-known composition. Borodin left the opera (and a few other works) incomplete at his death. Photo shows: Prologue to the opera "Prince Igor" at the Bolshoi Theatre. 1898 Supplied By: SCRSS - Society for Co-operation in Russian & Soviet Studies