He was in his prime, or should we say his "Primavera", when he painted "Fortitude" in 1470
Review ...late author and noted art critic Federico Zeri's 
engaging verve and ... Amazon Try Prime ..... From Bruno Santi's book, it 
becomes clear what he liked in his own work: ... placed figures with his Primavera 
and in the first Italian inscription in a painting with his ...