The Wikipedia article on standing desks, as well as a bunch standing desk producer's websites, tote around the fact that da Vinci used a standing desk.
But I haven't actually seen a source for this. I mean sure, you can infer he used a standing desk as he was a painter/engineer, but does anyone have a source to enlighten the truth for me?
I've been researching this for a while now and have not found a single credible source that confirms his use of a standing desk. I'll continue my search and will report in here if I discover anything new.