Henry Mather Greene and his brother, Charles Sumner Greene who established the architectural firm of Greene and Greene, were influential American architects. Active primarily in California, their bungalow houses and larger-scale ultimate bungalows are prime exemplars of the Arts and Crafts movement.
With more than 600 executed buildings to his credit, Frank Lloyd Wright is regarded by many as the greatest architect of the twentieth century. In 1900, he began designing his celebrated and unprecedented prairie houses, which include the Robie House in Chicago (1909) and the Coonley House (1908) in