Thonet Bentwood Chair
Designed in 1859 by German cabinetmaker Michael Thonet, the No. 14 chair (also known as the Vienna coffeehouse chair) emerged as the first example of bentwood furniture. Surviving models from the mid- to late 1800s feature hand-caned or laminated wood seats and are usually stamped with the country of origin. (By the 1870s, Thonet owned offices in almost 20 countries.) At auction, a No. 14 from the 1860s with a near-perfect seat can fetch about $1,000.
Picasso owned one, so did Brahms. And 150 years after Michael Thonet introduced the first mass-produced seat, and its design has remained virtually unchanged for 150 years. The chairs became staple in cafes around the world. They are extremely durable; if you knock them over they bounce rather than break as they are so flexible but elegant.