giampietrino, probably giovanni pietro rizzoli (active 1495–1549), was a north italian painter of the lombard school and leonardo's circle, succinctly characterized by sidney j. freedberg as an "exploiter of leonardo's repertory." giampietrino was a very productive painter of large altarpieces, madonnas, holy women in half figure, and mythological women. for a long time, the true identity of the artist was unknown; he was only known as…