Architect Frank Gehry’s extraordinary building in the Basque country of northern Spain resembles a gigantic abstract sculpture in titanium, glass, and limestone. Its luminous exterior is as visually stimulating as the cathedral-like atrium and the organic forms of the galleries—an artful complement to the building’s artistic contents. In this outstanding program, Mr. Gehry discusses his design approach and the architectural evolution of the museum, from sketches, to computerized blueprints, to the completed project. (33 minutes)