The Art Nouveau style flourished throughout Europe and the United States from the late 19th century until the onset of World War I.  Art Nouveau is characterized by its use of long, flowing lines, organic shapes and asymmetry.  The style was a deliberate push against the imitative art and design that dominated much of the 19th century, seeking to break from the past and create a new style reflective of the technological advances of the time.   Art Nouveau pieces were often asymmetrical, with sinuous lines and strong decorative emphasis.  Natural motifs such as flowers, vines, leaves and even animals, were often stylized and abstracted.  Although extremely popular during its heyday, it was a relatively short design period.