caption: The image shows a set of six art nouveau postcards featuring a woman in a green dress. The postcards are arranged in a collage-like fashion, with each card featuring a unique design. The woman in the center of the postcards is wearing a long, flowing green dress with a high neckline and long sleeves. Her hair is pulled back in a bun and she has a gentle expression on her face. The background of each card is a light blue color, and the postcard has a glossy finish.