Art Nouveau
The standard rap on Art Nouveau, as I remember from my student art history books, is that it was a short-lived (roughly 1890-1905) hiatus between the historic revival styles of the nineteenth century and the true-blue modernism of the Bauhaus. Art Nouveau was largely pooh-poohed,, written off as an aesthetic dead-end that sprang full-blown from the (feverish) artistic imaginations of architects and designers such as Antonio Gaudi, Victor Horta, Hector Guimard, the young Peter Behrens, Louis Comfort Tiffany and (though he is usually not included in this company), Louis Sullivan. The problem for art historians is that the sinuous decorations of the style obviously have little to do with the abstract minimalism of the Modern Movement.