You must have seen the postage stamps from several countries showing famous paintings. The one showing Venus is from his well-known painting "Birth of Venus". Go here to see a parade of his artist's excellent works.
There's so much to tell about this artist and so many of his works to be seen, that I will never be able to do him justice. You have to read and see some of it for yourself here.
His paintings "The trials and calling of Moses", "Life of Moses" and "The Temptation of Christ" have so many details within them that to really appreciate the paintings you have to see it in sections. Run the slide show at the link above and see each piece in detail so the beauty of his great painter's talent can awe you