Sitting Instruments of Our Times

Below are a few examples of what people have sat down on over the years:
European folding-chair from 11-1200 B.C. Originally with a seat of otter skin.
Chair and "table" from the Middle Ages. About 1200
Beautifully carved wooden chair from 1100. Oslo University.
European chair and writing table from a country estate. Copperplate from 1847.
Vincent van Gogh's famous chair from Arles, painted in 1888.
Dangerous contraption from a telephone exchange. Note the knob. If you lost your grip, you might mow down 20 other operators.
Office chair from the sixties.

Modern office chair from 1995 with separately adjustable seat and back.