The Illinois Institute of Technology (Illinois Tech or IIT) is a private research university in Chicago, Illinois, United States. Tracing its history to 1890, the present name was adopted upon the merger of the Armour Institute and Lewis Institute in 1940. The university has programs in architecture, business, communications, design, engineering, industrial technology, information technology, law, psychology, and science. It is classified among "R2: Doctoral Universities – High research activity". The university's historic roots are in several 19th-century engineering and professional education institutions in the United States. In the mid 20th century, it became closely associated with trends in modernist architecture through the work of its Dean of Architecture Ludwig Mies van der Rohe, who designed its campus.