The Charles B. Russell House (also known as the "Duffel Building") is a historic residence in the Clifton neighborhood of Cincinnati, Ohio, United States. Built in 1890, it is a large two-and-a-half-story house constructed primarily of limestone. Multiple windows, including several dormer windows, pierce all sides of the turret, while another large dormer window with Palladian influences is present on the house's southern side. A common theme in the design of the house's windows are string courses of stone that connect the windows and voussoirs that radiate out from the windows to many directions. Among its most distinctive architectural elements are the heavy stone front porch, which transitions from a verandah on one end to a sun porch on the other end, and the large circular turret on t