Art Nouveau is recognized through expressive lines, freedom from traditional art rules, and organic themes. Originating from the Aesthetic Movement, it's called "Stile Liberty" in Italy and "Modernismo" in Spain. Its defining characteristic is undulating asymmetrical lines, resembling natural forms like flower stalks, vine tendrils, and insect wings. These lines can be elegant or possess a strong rhythmic force. Here, a four-petaled (lucky clover?) flower is off-kilter, in motion, perfectly captured through Art Nouveau kinetic energy.