In 1959, Swiss artist Daniel Spoerri pioneered an inventive new series of artist-created editioned multiples to be broadly distributed. While artists have long created editioned multiples of artworks--from prints and handmade books to sculptures--Spoerri's project placed a radical focus on multiplication and movement. His Edition MAT (Multiplication d'art transformable) presented a selection of works by key figures in postwar kinetic and Op art, including an array of artworks that could be manipulated, moved, and altered optically, electrically, or through physical interaction. <p/>Multiplied is the first in-depth English-language study of this seminal project in the history of kinetic and postwar art. The catalog presents the entirety of Edition MAT's three collections--from 1959, 1964, and 1965--that together consist of forty-nine artworks by thirty-five European, North American, and Latin American artists, including leading figures such as Marcel Duchamp, Roy Lichtenstein, Man Ray, Dieter Roth, Jesús Rafael Soto, and Jean Tinguely, alongside lesser-known artists. With three essays, artwork entries, and an appendix of newly translated historical texts, this volume sheds light on under-studied artworks as well as the body of critical thought connecting art, commerce, and display in the postwar period.