Question: The viola organista is a musical instrument designed by Leonardo da Vinci, was an Italian Renaissance polymath whose areas of interest included invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography, he died in which year?
Sentence (from "Viola organista"): But though similar instruments have been built, no extant instrument constructed directly from Leonardo's incomplete designs is known.
Relevant evidence: No