An important early mobile, ‘Untitled’ (1939) is poised between motion and stasis, elegantly embodying how the artist revolutionized sculpture during the 20th century. The 1930s were a period of immense innovation for Calder during which he created his first mobiles, giving form to an entirely new type of art by ingeniously freeing sculpture from its static plinth. As the decade progressed, Calder’s mobiles became increasingly complex, growing in scale and oscillating parts, culminating in intricate works such as ‘Untitled.’ An exceptionally polychromatic work, Calder added a range of hues, including green, yellow, and orange, to his signature palette of fire engine red and charcoal black. ‘Untitled’ showcases Calder’s remarkable ability to transform the humble, industrial material of sheet metal into something evocative and poetic. It explores the limitless potential of equilibrium and dynamism, showcasing Calder’s gift for creating perfectly calibrated compositions that combine impeccable balance with aesthetic pleasure.