The Herbert and Katherine Jacobs second house has national significance as the first house built under architect Frank Lloyd Wright's concept of the Solar Hemicycle. Based on arcs, radii, and circles, its design includes a floor-to-roof glass wall oriented toward the sun and an earth berm protecting three sides from winter winds. Wright's experimentation with passive solar design predated the energy crisis of the 1970s by 30 years and found a unique and beautiful expression in this house.