Leopold Auer
At four years old, he started lessons with Elias Malkin. He was a child prodigy, making his public debut at seven, in Kovno (now Kaunas, Lithuania) playing the Violin Concerto in E minor by Felix Mendelssohn. In 1910, he entered the Saint Petersburg Conservatory to study under Ovanes Nalbandian and later under Leopold Auer.