The three-part documentary continues as writer and broadcaster Stephen Smith explores Renaissance Florence under the reign of Grand Duke Cosimo Medici, whose fledgling court prized the finer things in life. Successful courtiers had to have brains as well as brawn, and some looked to theorists like Niccolo Machiavelli for underhand ways to get ahead, while enlightened polymaths turned their minds to the heavens - and to ice-cream