Rosen Architecture is a third generation practice led by Patrick Rosen and his father, Michael B. Rosen. Originally established in 1945 by William M. Horowitz and Michael's father, Alfred J. Rosen, the practice is still located in its original offices in the historic Monadnock Building in downtown Chicago. Working in a wide range of project types the firm offers the full range architectural services from concept to completion of construction to suit client needs, budget, and style preferences. Patrick Rosen is a Licensed Architect in the State of Illinois and a member of the American Institute of Architects.