Frank Lloyd Wright was a young architectural assistant working with Adler and Sullivan at the time the Rookery was finished in 1888. Architect Daniel Burnham was a friend of Wright patron Edward C. Waller. Waller managed the Rookery; Wright had his offices in the building in 1898–1899. In 1905 Wright received the commission to redesign the lobby in the building; at the time considered the grandest in Chicago. Wright's work on the Rookery recast the entryway in his Prairie style and added a sense of modernity through his simple but effective lighting design. Wright's work on the Rookery is his only work on any building within the downtown cityscape.