I recently visited the Knoll Museum, which is in Knoll’s headquarters in East Greenville, Pa. “Museum” makes it sound grander than it is; it’s more like a showroom with 70-odd chairs on the floor. What makes it better than any design museum I’ve ever visited is that you can sit in the chairs. Simply looking at a chair is kind of pointless; about as useful as being shown photographs of food. So I sat. Mies’s Barcelona Chair was pretty comfortable, although hard to get up out of. Breuer’s B35 lounge chair, which I’ve always admired but never sat in, was disappointing—the top bar cut into my back. Saarinen’s Grasshopper Chair was OK, but I’ve never been a fan of contoured chaises longues—not enough freedom. There were several of Venturi’s PoMo chairs from the 1980s—embarrassingly unsittable. Ditto for a Meier-design barrel chair. While all the chairs in the Knoll museum were Knoll chairs, there was one exception: the Eames-Saarinen shell chair, designed in 1940 and recently manufactured (for the first time) by Vitra. Beautiful to look at and beautiful to sit in; a masterpiece. Before I left, I tried out an unprepossessing executive chair; the tufted leather looked so inviting. The moment I sat down I knew this was a chair I wanted. It was designed by Charles Pollock in 1963, and the ingenious design consists of an extruded aluminum rim that acts as the main structure. The arms are phenolic plastic. Unlike today’s ergonomic chair it has few adjustable features. It doesn’t need them.