Fowler's Folly, built during 1848–1853, was the octagonal home of Orson S. Fowler in Fishkill, New York. It was a "monumental" house for its time, with four stories and 60 rooms. and Accompanying 10 photos, exterior and interior The house was condemned as a public health hazard and dynamited in 1897.The Octagon House, Orson S Fowler: Introduction to the Dover Publications, Inc. 1973 reprint.

Orson Squire Fowler was author of a book, The Octagon House: A House for All, that was first published in 1848. The book, frequently mischaracterized as a pattern book, ignited a fad for octagon houses in the United States and perhaps also in Canada.

See also List of octagon houses

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