The Virginia Museum of Fine Arts ,
Richmond, VA contains both the Lewis and Kreuzer Collections. The Lewis
Collection contains many fine Tiffany lamps as well as an extraordinary
group of art nouveau furnishings. The Kreuzer Collection is reputedly
the finest collection of Jugendstil and art nouveau belt buckles in the
world. Catalogues of both collections have been published and are well
The Walters Art Museum, Baltimore, MD has a small collection of lovely art nouveau objects on display.
The Wolfsonian, Miami Beach, Florida has pages devoted to Dutch and Italian art nouveau as well as the British arts and crafts movement.
The Minneapolis Institute of Arts has pages devoted to art nouveau in America.
Homepage of noted art nouveau scholar Dr. Gabriel Weisburg.
I highly suggest his work on the impact of Sigfried Bing (a Parisian
art dealer who coined the term L'Art Nouveau and is credited with
starting the movement in France) including a recent movie and multiple
books which are widely commercially available. Find a review of Dr.
Weisberg's most recent book and a travelling exhibition on Sigfried