Hans Hoffman [1880-1966] identified Elysium [top image] as his own favorite work.
Hofmann came into his own when he was in his 70s and 80s. Robert De Niro's parents met at a Hofmann class. Hoffman's considered by some as the most important artist/teacher of the last several hundred years. Push-Pull. Space. Plasticity.
An earlier reference to De Niro's father here.