"Of the five known octagon houses built in San Francisco, two have survived: the Feusier House and the McElroy House.
In 1849, the New York City phrenologist Orson Squire Fowler, published a book titled The Octagon House: A Home for All in which he touted the many benefits of houses built with eight sides rather than the customary four. Impressed by Mr. Fowler's arguments, George Kenny built this house in 1858 and sold it to to Louis Feusier in 1870.
The building remains a private residence."