caption: The image shows a collage of four different types of art nouveau patterns, each with its own unique design. The patterns are intricate and detailed, with a variety of shapes and colors that create a beautiful and eye-catching display. The colors range from bright and vibrant to muted and subtle, creating a stunning visual effect. The designs are arranged in a symmetrical pattern, with each pattern overlapping the next, creating an interesting visual effect that is sure to draw attention.