Alexander Calder (Philadelphia, United States, 1898 - New York, 1976). American sculptor. He was born into a family of artists but was not initially inclined towards art and studied mechanical engineering. In 1923 he attended the Los Angeles Art Students League.
Influenced by abstract artists such as Piet Mondrian or Jean Arp, in 1931 he joined the Abstraction-Creation association, and the same year he created a work that Marcel Duchamp christened mobile. Mobiles are precisely the creations that elevated Calder to the highest peaks of modern sculpture. With them he proposed to create abstract works endowed with movement, which would reflect, thanks to their dynamism, the changing effects of light. He also produced immobile sculptural works, known as stabiles.
"The sense of motion in painting and sculpture has long been considered as one of the primary elements of the composition."