"The first painting to appear with an affirmation of simultaneity was mine and had the following title: 'Simultaneous visions', [Boccioni painted in 1911]. It was exhibited in the galerie Bernheim in Paris, and in the same exhibition my Futurist painter friends also appeared with similar experiments in simultaneity."
January 1, 1970
https://en.wikiquote.org/wiki/Umberto_Boccioni