Art Nouveau or Art Deco? 

Here is Wikipedia:  Beardsley was the most controversial artist of the Art Nouveau era, renowned for his dark and perverse images and grotesque erotica, which were the main themes of his later work.

The images in the Wikipedia entry, like those in a hard-cover book of Beardsley's work, resemble the Art Deco style more than they do that of Art Nouveau.

Can anyone shed light upon the matter?

MacLennan123