Model of Leonardo da Vinci's Cannon from a Convention in Rome in 1970.

Leonardo di ser Piero da Vinci (April 15, 1452 – May 2, 1519) was an immensely talented Italian Renaissance Roman Catholic polymath: architect, anatomist, sculptor, engineer, inventor, geometer, musician and painter. Leonardo was the archetype "Renaissance man," infinitely curious and equally inventive. He is widely considered to be one of the greatest painters of all time…

newworldencyclopedia.org/entry/Leonardo_da_Vinci

Saturday challenge 435. - 28.03.2026 - The Weirdest or Most Unusual Thing You Own