In the 20th century, visual artists, like composers, are fascinated by and somewhat envious of each other's artistic expressions. But what does cultural science say about these mixtures, fraying, and overt crossings of boundaries, where each artist takes what they need for the formation of their creativity? This book takes the necessary steps to investigate these boundary phenomena in both directions: into art history as well as musicology. It yields astonishing and surprising insights and overviews. Those who wander through the museums and concert halls of the world after reading will see and hear many things differently. Whether it’s polyphonic painting, music inspired by images, sound sculptures, color pianos, or record covers – the wealth of imagination is vast.