Alexander Calder (trained as an engineer) challenged the long-held notion that sculpture was static and monumental. His inventive, colorful, animated “mobiles” epitomize the innovative, optimistic spirit of early-twentieth century modernism. In all of Calder’s mobiles, his objective was not to represent or refer to nature, but to capture its dynamic actions and unpredictable, living systems. This exhibition will include mobiles, jewelry, and works on paper drawn from Bay Area collections, including the holdings of several of the Museum’s founders and longtime supporters.