During 1875–76 he composed his first ballet, Swan Lake. The first performance in 1877 was considered a failure, based less upon Tchaikovsky's score (which was severely cut and further compromised with interpolations by other composers) than by a poor performance and mediocre physical production. Swan Lake was later revived with new choreography by Petipa and Ivanov in 1895, at which time it was recognized as a masterpiece of the ballet repertoire. Around the end of 1876, Tchaikovsky began to receive financial support from a wealthy widow, who was to remain his devoted patroness for the next 14 years. With a new-found financial security, Tchaikovsky embarked upon a period of incredible musical fecundity, producing such cornerstones of the international repertoire as his Fourth Symphony and the Violin Concerto in D major, Op. 35.