While Wright designed the interior, architect David L. Leavitt is generally credited with the exterior. Manitoga postdates Frank Lloyd Wright's Fallingwater (built in 1936-39), and while the there is some resemblance, the latter was not a direct inspiration. The two Wrights were not related but were acquaintented with each other.  Photo 4 of 4 in Veronica's Favorites by veronica from The Remarkable Home of Modernist Designer Russel Wright

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While Wright designed the interior, architect David L. Leavitt is generally credited with the exterior. Manitoga postdates Frank Lloyd Wright's Fallingwater (built in 1936-39), and while the there is some resemblance, the latter was not a direct inspiration. The two Wrights were not related but were acquaintented with each other.