[3] He studied at the Art Students League of New York under John Henry Twachtman,[4] and at the Académie Julian in Paris with Jean Paul Laurens in the late 1800s.

In addition to his own work, Kroll taught at the Art Students League of New York and the school of the National Academy of Design, where he had his first solo exhibition in 1910, was named as Associate in 1920 and as full Academician in 1927.

[7] Artist-writer Jerome Myers in his autobiography Artist In Manhattan said: Leon Kroll has the eye of a hawk and the heart of a dove, which is to say that he has both intelligence and feeling.

An academician and at the same time a humanitarian, Leon Kroll is a consummate craftsman, always sympathetic towards youthful talent, boldly standing up for the rights of others as well as for his own.

A fluent performer in many branches of art, his convictions have remained unshaken by the extremists; he has consistently carried his classic banner through the turmoil of modernism.