Art Nouveau was an international style of art, architecture, and applied art that flourished between 1890 and 1910. It is characterized by its use of long, sinuous, organic lines inspired by natural forms — flowers, plants, and flowing curves. The style sought to harmonize art with the functional aspects of everyday objects and architecture.

Prominent artists include Gustav Klimt, Alphonse Mucha, and Antoni Gaudí. Art Nouveau encompassed all forms of art and design, from paintings and posters to furniture, jewelry, and entire buildings.