Leonardo's Real Contribution - A factoid

De Vince is most remembered as one of the world's greatest artists, responsible for classics like the Mona Lisa, the Baptism of Christ, and the Last Supper.  But in reality, only 15 paintings exist that can be attributed to him, with another 3 or 4 contested pieces likely to have been his work. On the other hand, his sketches and notes from more than 30 autopsies cover thousands of pages from a time when human anatomy was one of sciences greatest mysteries. His diagrams and explanation of the heart were unrivaled until the 20th century.