Art Nouveau may go by many different names, but its look is unmistakable. The decorative arts and architecture movement flourished in Europe throughout the late 18th and early 19th centuries, where it became known as Jugendstil, Stile Liberty, and Szecesszió in Germany, Italy, and Hungary, respectively—all with differing regional takes on the aesthetic. Characterized by curving lines, asymmetry, and a natural, oftentimes botanical motif, the Art Nouveau style marked a notably experimental departure from the traditional Gothic and neoclassical influences across the continent in decades prior. Filled with romantic flair, the style emphasized craftsmanship in response to the industrialization that was quickly becoming dominant at the time. Architects such as Hector Guimard, Antoni Gaudí, and Otto Wagner became famous for their decadent organic-inspired designs, which commonly featured colorful flourishes and detailed iron and glass work. The interiors of Art Nouveau buildings were known for being as ornate as their façades, often decorated with exquisite custom furnishings and hand-painted wall treatments. From Barcelona to Budapest, gorgeous examples of Art Nouveau architecture can be found all around the globe. Below, AD has selected 11 Art Nouveau wonders that’ll make you stop, stare, and contemplate.