Octagon House (The), San Francisco

This proves that fadism is not a recent phenomenon. The design of the Octagon House, an oddity built in 1861 is based on a popular theory of the mid-1800s, namely that people inhabiting a space of this shape would live healthier, happier lives. The building now houses a museum of American Colonial and Federal Era decorative arts and historical documents. Another octagon house, not open to the public, can be seen on the 1000 block of Green Street.