5/5. La Primavera. The title of the Florentine artist Sandro Botticelli 's exquisite painting translates as "Spring", yet this huge allegorical tableau, with its mythological characters and themes of rape and failing in love, contains some of the first erotic images of the Renaissance. Narrator Samuel West traces its origins. A new series airs later in the spring. Director Ian Jones ; Series editor Jeremy Bugler Samuel West is in Historians of Genius - in Their Own Words. 9.30pm BBC4