The Charles L. Manson House is a Frank Lloyd Wright designed home in Wausau, Wisconsin. Built over two years (1938 - 1941) for a successful local insurance agent, the Charles and Dorothy Manson House is among Wright’s Usonian designs. The home uses a square unit system, but introduces 30 and 60 degree angles to eliminate right angle corners. However, the strong horizontal line of the house descending three levels down the sloping wooded lot has the silhouette of Wright’s Prairie School houses.