The Metropolitan Seminars in Art Portfolio 12: The Artist as a Visionary is a vintage nonfiction book authored by John Canaday, published by the Metropolitan Museum of Art in 1959. This hardcover book delves into the world of art history and criticism, focusing on the theme of art as a visionary endeavor. With a strong emphasis on visual elements, this illustrated book offers a unique perspective on the art and cultural landscape of the 1950s, making it a valuable addition to any art enthusiast's collection.