Darwin D. Martin was an American businessman and a prominent figure in the early 20th century. He is best known for his association with the architect Frank Lloyd Wright, with whom he collaborated on several architectural projects, including the famous Darwin D. Martin House in Buffalo, New York. This house is considered one of Wright's masterpieces and showcases the principles of the Prairie School style. In addition to his contributions to architecture, Martin was a successful executive in the Larkin Soap Company. His business acumen and vision helped shape the company into a significant player in the soap industry during its time. Martin's legacy continues through his contributions to both architecture and business.