Plan for 2-3 days in Venice to explore St. Mark's Basilica, the Grand Canal, campanile di San Marco and enjoy traditional cicchetti and wine.
Plan for daytrip or 1 night for shopping, visit the Duomo, Castello Sforzesco and grab an aperitivo by the Navigli.
Plan for 2-3 nights to explore the Tuscan city touring the Duomo, Uffizzi Gallery, Ponte Vecchio and enjoy Picci al sugo, Fiorentina, and traditional Schiacciata.
Plan for 2-3 nights to explore Italy's capital before flying back home.