 Even though Hundertwasser first achieved notoriety for his boldly-coloured paintings, he is more widely known for his individual architectural designs.These designs use irregular forms, and incorporate natural features of the landscape.The "Hundertwasserhaus" apartment block in Vienna has undulating floors ("an uneven floor is a melody to the feet"), a roof covered with earth and grass, and large trees growing from inside the rooms, with limbs extending from windows.