Pontormo's ultimate contribution to Florentine art rests on his drawings. There is a didacticism intrinsic to Pontormo's method of patient life drawing that had a major impact on Florentine art practice. His study of anatomy seems to have been as thorough as that of any Renaissance artist. Drawings made directly after bones and surface anatomy still exists. Passages of close anatomical observation can also be found within his surviving figure studies.