An early photograph of a gala event in the Crystal Ballroom, looking toward the entrance to the ballroom.

The same event, this photograph taken looking toward the stage.

The earliest Mayo Hotel photograph in our collection. This one was taken in 1925.

This photograph -- and the next two -- are from the opening of the Mayo Motor Inn August 18, 1952.

Mayo Motor Inn opening August 18, 1952.

Mayo Motor Inn opening August 18, 1952.

The Red Top Cab Company in front of the Mayo, circa late 1920s. Note the electric trolley tracks.

This is the original photograph that the famous linen postcard of the Mayo Lobby was made from.

The new Mayo Hotel and the Pet Building, circa 1925.

The R. N. Bynum residence on the corner of 5th and Cheyenne, the current location of the Mayo. This photograph was taken Christmas Day, 1915.

A photograph of the canopy over the 5th Street Main entrance to the Mayo Hotel. Circa 1950s

This is a vintage photograph showing an early view of the Mayo Hotel, as it appeared in the early 1950s.

This vintage photograph shows the 7th meeting of the Carter Oil Conference. The meeting was held in the Crystal Ballroom in March, 1926, about a year after the Mayo opened.

This is a close-up of the identication of the Carter Oil Company, Western Division, Conference identifying the date and location.

This is a vintage photograph of the Mayo Hotel Employee Convention held in the Crystal Ballroon in the 1920s. The employees are identified on the back of the photograph.