Belle epoque fashion 1890, Germany. Couple dancing the valse bleue.
Belle epoque is the term for a period of about 30 years at the turn of 19th to the 20th century. The Belle Epoque occurred mainly on the boulevards of the metropolis, in the cafes and cabarets, the studios and galleries, concert halls and salons, supported by a middle and upper middle class.
In fashion, a liberation from the constricting of Victorian pageantry and Wilhelmine fashion was to the development of the reform mode and after 1900 by the abolition of the corset.

Support and Seduction: The History of Corsets and Bras (Abradale Books) by Beatrice Fontanel.
Thoughout the ages, women's breasts have been subjected to the endless whims of fashion. From the ancient Greeks to Mae West and Madonna, this light-hearted book charts the changing shapes of female beauty. The elegant and amusing images - including fashion drawings, paintings, photographs, and film stills - illustrate the often surprising history of the garments women have worn for support - and seduction.