Pyotr Ilyich Tchaikovsky was a Russian composer of the Romantic period. He was the first Russian composer whose music made a lasting impression internationally. Tchaikovsky wrote some of the most popular concert and theatrical music in the classical repertoire, including the 1812 Overture, his First Piano Concerto, the Violin Concerto, the Romeo and Juliet Overture-Fantasy, several symphonies, the opera Eugene Onegin, and the ballets Swan Lake, The Sleeping Beauty and The Nutcracker.