Anton Grigorevich Rubinstein (Russian: Анто́н Григо́рьевич Рубинште́йн, Anton Grigor'evič Rubinštejn) (November 28 1829 – November 20 1894) was a Russian pianist, composer and conductor who became a pivotal figure in Russian culture when he founded the Saint Petersburg Conservatory. He was the elder brother of Nikolai Rubinstein who founded the Moscow Conservatory (but was not related to the later Polish pianist Arthur Rubinstein (1887–1982)).
As a pianist, Rubinstein ranks amongst the great 19th-century keyboard virtuosos. He became most famous for his series of historical recitals—seven enormous, consecutive concerts covering the history of piano music. Rubinstein played this series throughout Russia and Eastern Europe and in the United States when he toured there.
Although best remembered as a pianist and educator (most notably in the latter as the composition teacher of Pyotr Ilyich Tchaikovsky), Rubinstein was also a prolific composer throughout much of his life. He wrote 20 operas, the best known of which is The Demon. He also composed a large number of other works, including five piano concertos, six symphonies and a large number of solo piano works along with a substantial output of works for chamber ensemble.