violaorganista.com/en/home/ Designed more than 500 yrs ago by #LeonardodaVinci never built in his lifetime...sketch/drawings in #CodexAtlanticus... concept for a bowed str inst which at the same time is #keyboard inst #SławomirZubrzycki built the first #ViolaOrganista ..."
youtu.be/OnZx0vVKC4I?...