The work of Brazilian designer Paulo Mendes da Rocha reached international recognition when he was awarded the 2006 Pritzker Architecture Prize. That same year, we introduced his Paulistano Armchair (1957) – a classic that had never before been available in the United States. This chair was originally designed for the Paulistano Athletic Club in São Paulo, Brazil. The frame, a continuous 17-foot-long piece of solid steel, is welded in a single spot. This deceptively simple structure is then wrapped in almost an entire hide of leather that will gain depth and luster as it ages. Exceptionally comfortable, the Paulistano flexes slightly, and the sling can be adjusted up or down the frame for upright or relaxed sitting positions. The stainless steel frame is hand-machine polished and may exhibit markings consistent with hand craftsmanship. The frame in phosphatized carbon steel, which is the original raw material used in 1957, is slightly rough to the touch and will oxidize slowly with time. This was the intent of the architect, who wants the appearance to evolve, believing the charm of a piece of furniture resides in its non-permanent character. To prevent rust, the phosphatized frame should be treated with WD-40® twice annually.