Oh the Octagon! The very rare Octagon house was a unique house style briefly popular in the 1850s in the United States and Canada. The style can generally be traced to the influence of one man, amateur architect and phrenologist Orson Squire Fowler. In his book, The Octagon House: A Home for All of 1848 (and reprinted with more photos in 1853), Fowler advocated for the shape’s benefits for buildings in that the octagon allowed for additional living space, received more natural light, was easier to heat, and remained cooler in the summer. These benefits all derive from the geometry of an octagon: the shape encloses space efficiently, minimizing external surface area and consequently heat loss and gain, building costs etc. Some were convinced and built Octagon houses, but the style and its brief period of popularity, died by the 1860s. This example in Stoneham, Massachusetts was built around 1850 for and by Enoch Fuller, a close personal friend of P. T. Barnum, founder of the Barnum & Bailey Circus. Fuller visited Barnum’s octagonal home in Bridgeport, Connecticut and he decided to construct an octagon house in Stoneham. The home was owned by Col. Gerrry Trowbridge not long after completion. The home was built with a fireplace in every room, a spiral, “flying” staircase, and a sweeping veranda.