What is hundertwasser's most famous piece of artwork?

Friedensreich Hundertwasser's most famous piece of artwork is likely the "KunstHausWien," an art museum in Vienna that he designed. Known for its whimsical and colorful architecture, the building features irregular shapes, vibrant colors, and a green roof integrated with nature. Hundertwasser's unique approach to art and architecture emphasizes harmony with the environment, making the KunstHausWien a celebrated example of his vision. Additionally, his paintings, such as "The Tree of Life," are also widely recognized and showcase his distinctive style.