Music for the ballets Swan Lake (1877), The Sleeping Beauty (1889), and The Nutcracker (1892) are among Tchaikovsky's most popular works (1892). He is well known for the Romeo and Juliet overture (1870) and Symphony No. 6 in B Minor (Pathetique). Tchaikovsky died at the age of 53 in 1894, after suffering from tuberculosis for several years. His death was caused by a combination of factors including excessive work hours and a lack of health care facilities in Russia at that time. His wife and daughter were left with nothing; his son, Peter, became a pianist who taught Beethoven's sonatas to Roosevelt, and his daughter, Maria, married one of Russia's richest men, Alexandre Benckendorff, who helped support the family during this difficult time. Tchaikovsky's music is still performed around the world today. His ballets are still danced by professional companies, and his operas are still heard on stage every year. However, none of these works can compare with his greatest achievement: the ballet The Swan Lake. It is said that he created this work when he was only 24 years old. The music and lyrics were written by Michael Baryshnikov and Vladimir Vasiliev, respectively. The choreography was done by Marius Petipa and Alexander Gorsky.