The Hotel Brevoort (left), located at 120 West Madison Avenue, between Clark and LaSalle Streets, was billed as "Absolutely Fireproof" when built in 1906.

The building facade was reclad in glass and converted to an office building in 1953.

The building is still used as an office building today.

The Lobby (right) of the Hotel Brevoort was highlighted by a second floor mezinene level with a beautiful curved railing.

The lobby decor includes maroon marble around fluted white and gold square columns and decorative tile floors. A stairway leads up to the mezinene level.

Heavy leather chairs and dark green furniture with maroon velvet are set around a maroon oriental rug. The ceiling is painted in deep blues and purples.

Another view of the Lobby (right) shows the view as you walk in the hotel's front door.

The ceiling is decorated with gold trim and murals. The mezzinene level can be seen to the left.

This 1909 view shows hotel patrons lingering at the Madison Avenue Entrance (right) to the Brevoort.

The entrance features a decorative vaulted ceiling, hanging glass-paned light fixtures, and a circle-designed window over the front entryway.

A stairway leads down to the "Rainbow Room" Restaurant.

The Hotel Brevoort Buffet (left) was one of the most ornate bars in Chicago.

This unique round bar with a glass rail and mirrored columns was decorated with ornate tile paterns and plaster rotunda. A chandelier hangs in the middle of the bar along with a circular shelf in the middle. Deep maroons, cream, rose, green and gold created an elegant look.

The handwritten note on this post card reads, "Jimmie this is a swell bar, Hank"

The Hotel Brevoort added to its ornate interior with the Rainbow Room (right) Dining Room with its large wall murals.

The colorful wall murals depict "Hindu Pilgrims Preparing The Evening Meal On The Banks Of The Ganges."

The dining area features tile floors and maroon marble walls following in the style of the Lobby and Bar.

Another view of the Rainbow Room (right) shows the same mural as above.

The room is air conditioned with an electric fan perched above a room divider.

Another view of the Rainbow Room (right) shows a different angle of the dining area.

The Ganges River mural continues around the room.

A pair of electric fans help cool the room.

This 1940s-era Private Dining Room (right) at the Hotel Brevoort offered a simple dining option.

The card reads, "Its attractive Rooms, good food, traditional hospitality and homelike atmosphere has made the Brevoort the headquarters of many fraternal groups and organizations for many years."

This view shows an informal room with a round table set for nine, with white linens, wooden chairs, an overstuffed couch, side chair and lamp and a bright spray of flowers.

This 1950s-era Brevoort Hotel post card shows the famous Crystal Bar, a typical Guest Room and the Lounge and Main Desk (right).

Red vinyl bar stools have been added to the bar, which has otherwise changed little since its 1906 construction.

A stained glass window can be seen behind the bar of a woman holding an infant up to the sky.

Another 1954 post card shows the Crystal Bar, Dining Room and Guest Bedroom (right).

The Dining Room in this view is not the "Rainbow Room" but an eating area adjoining the Crystal Bar.

The Guest Bedroom offers simple furnishings and a radio.