Unity Church (1904), Oak Park, Illinois

Unity ChurchUnity Church was the first public building in America to be built entirely of exposed concrete. Concrete was used partly to keep construction costs low, but also because of Wright’s “principle of integrity.” This principle called for the building to be “thoroughbred, meaning built in character out of the same material.” To Wright, this meant that reinforced concrete was the only material possible.
Unity ChurchMost critics consider this sanctuary one of Wright’s highest achievements. The ceiling is opened above the central cube into a grid of beams. Twenty-five stained-glass skylights are set into the grid. Clerestories run full width across the tops of each balcony just under the roof. Light enters the sanctuary only from above, filtered by the colors and patterns of the leaded windows and skylights.

As Wright said, the space is flooded “with light from above to get a sense of a happy cloudless day into the room… the light would, rain or shine, have the warmth of sunlight.”
Unity Church, PlanThe diagram above shows a composite floor plan of three levels. The architect’s use of the limited space on the building site provided ample room for the 400-member congregation in both the sanctuary (Unity Temple) and the parish hall (Unity House). The plan is closely related to the centralized churches of the Renaissance, being similarly based on pure geometries of the square and cube.
Unity Church, Drawing

Drawing copyright © the Frank Lloyd Wright Foundation.

For more information about Unity Church, see: www.unitytemple.org

References: Frank Lloyd Wright by Robert McCarter, ©1997 Phaidon Press Limited; The Architecture of Frank Lloyd Wright by William Allin Storrer, © 1995 MIT Press

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