On this episode of Expert Voices, Lisa Dennison explores one of Alexander Calder’s most iconic mobiles ever created, Untitled 1949. Calder famously said, "Why must art be static?" and this piece truly is full of movement and life. Through precise engineering Calder’s work is beautifully composed of arcing biomorphic forms, perforated sheet metal and aerodynamic shapes that flow through space of the room. Sotheby’s is proud to be offering the majestic piece, Untitled 1949, in its upcoming Modern Evening Sale, 16 November.