There were many notable Art Nouveau painters, each with their own unique style and approach. Some of the most famous Art Nouveau painters include Gustav Klimt, Alphonse Mucha, and Henri de Toulouse-Lautrec.

Gustav Klimt was known for his use of gold leaf and intricate patterns in his paintings. His most famous work, "The Kiss," features two lovers embraced in a swirl of gold and patterned fabric.

Alphonse Mucha was known for his use of decorative motifs and his images of women surrounded by flowers and vines. His most famous work, "The Seasons," features four women representing the seasons, each surrounded by different natural elements.

Henri de Toulouse-Lautrec was known for his depictions of Parisian nightlife and his use of bold, bright colors. His most famous work, "Moulin Rouge: La Goulue," features a dancer surrounded by vibrant colors and swirling patterns.