Pacioli
Paccioli, Paciolo or Luca di Borgo - 1445-1517 wrote: De Divina Poroportione which Leonardo illustrated. The only thing Leonardo did that was published in his life time. He lived with and taught Leonardo mathematics around 1497-1506.
probably by Jacopo de' Barbari. The other guy is potentially Durer. He also looks similar to the Man in Leonardo's "The Musician" - there is something weird about him!
Luca Pacioli
Paccioli, Paciolo or Luca di Borgo - 1445-1517 wrote: De Divina Poroportione which Leonardo illustrated. The only thing Leonardo did that was published in his life time. He lived with and taught Leonardo mathematics around 1497-1506.
See De Divina here:https://archive.org/stream/divinaproportion00paci
