Caffè Gilli (since 1733) and Caffè Rivoire (since 1872) are Florence's grand cafes. Drink at the bar to save 70% vs sitting.
Both face Piazza della Signoria. Sit for the view and the history; stand for the espresso experience.
Ditta Artigianale is the modern third-wave coffee alternative — single-origin espresso, pour-overs.