When Leonardo da Vinci was 42 years old, he hadn’t yet completed any major publicly viewable work. Not that he’d been idle: in that same era, while working for the Duke of Milan, Ludovico Sforza, he “developed, organized, and directed productions for festival pageants, triumphal processions, masks, jousting tournaments, and plays, for which he choreographed performances, engineered and decorated stage sets and props, and even designed costumes.” So explains gallerist and YouTuber James Payne in the new Great Art Explained video above...