The Cultural Center of Chicago (former library). Here is info on what you can see architecturally--it was a real beauty.
From Wiki:
The building was designed by Boston architectural firm Shepley, Rutan and Coolidge for the city's central library, and Grand Army of the Republic (GAR) meeting hall and memorial in 1892. The land was donated by the GAR and the building was completed in 1897 at a cost of nearly $2 million (equivalent to $57.58 million in 2016). It is organized as a 4-story north wing (77 East Randolph entrance) and a 5-story south wing (78 East Washington entrance), 104 feet tall, with 3-foot-thick (0.91 m) masonry walls faced with Bedford Blue Limestone on a granite base, and designed in a generally neoclassical style with Italian Renaissance elements. It is capped with two stained-glass domes, set symmetrically atop the two wings. Key points of architectural interest are as follows:
Randolph Street entrance and stairway - Entrance with doric columns, mahogany doors, and entry hall with coffered ceiling and walls of green-veined Vermont marble. The curving stairway is faced with Knoxville pink marble, and features mosaics and ornate bronze balusters.
Washington Street entrance, lobby, and grand staircase - Arched portal, bronze-framed doors, and a 3-story, vaulted lobby with walls of white Carrara marble and mosaics. The staircase is also of white Carrara marble, set with medallions of green marble from Connemara, Ireland, and intricate mosaics of Favrile glass, stone, and mother of pearl. The stairway to the 5th floor was inspired by Venice's Bridge of Sighs.
Grand Army of the Republic Memorial - A large hall and rotunda in the north wing. The hall is faced with deep green Vermont marble, broken by a series of arches for windows and mahogany doors. The rotunda features 30-foot walls of Knoxville pink marble, mosaic floor, and a fine, stained-glass dome in Renaissance pattern by the firm of Healy and Millet.
Sidney R. Yates Gallery - replica of an assembly hall in the Doge's Palace, Venice, with heavily ornamented pilasters and coffered ceiling.
Preston Bradley Hall - A large, ornately patterned room of curving white Carrara marble, capped with an austere 38-foot Tiffany glass dome designed by artist J. A. Holtzer. The Cultural Center states this to be the largest Tiffany dome in the world.
