Rookery Building

The Rookery Building is a historic landmark, office building located in Cook County, Illinois, United States. Completed by John Wellborn Root and Daniel Burnham in 1888, it is considered one of their masterpiece buildings, and was once the location of their offices. The building is 181 feet (55 m) high, twelve stories tall, and is considered the oldest standing high-rise in Chicago. It has a unique style with exterior load-bearing walls and an interior steel frame, which provided a transition between accepted and new building techniques.