A very old round house in Somerville, a Boston suburb:
According to Apartment Therapy, “The story is that the Round House was built in 1856 by inventor and manufacturer, Enoch Robinson. Robinson owned a Boston company that manufactured high-end decorative hardware — window fasteners, knobs, hand-made lock mechanisms, door handles, escutcheons– which you can still see in Boston’s State House and Old City Hall. He was also an inventor who designed and built perpetual motion machines in his spare time.”
“We’ve read that Robinson had been annoyed that a previous house which he had built was copied by local builders, so he brought in a specialized team from France to build a totally unique structure. When they were finished, he immediately sent them back home. The design of his round house was based on that of the Column House in the French “folly garden” of Desert de Retz in Chambourcy.”
The house is listed on the National Register of Historic Places. As of 2007, it looked to be in very poor shape.