He was in his prime, or should we say his "Primavera", when he painted "Fortitude" in 1470
[DOC] [TLE] Botticelli: Allegory of Spring (One Hundred Paintings) - Amazon.com [PAR] From Bruno Santi's book, it becomes clear what he liked in his own work: ... in the 
blue enamel armor and metal highlights of his Fortitude; color, in the dawn flesh 
... figures with his Primavera and in the first Italian inscription in a painting with his 
... David Landau and Peter Parshall's THE RENAISSANCE PRINT 1470-1500.