He would simply build an overground passageway above one side of the Ponte Vecchio, reaching from the Palazzo Pitti to the Uffizi offices.

BBC: Florence??s best-kept secret

Cosimo I de' Medici, then the second duke of Florence, purchased the Palazzo Pitti in 1549, and up until the completion of Versailles in Paris in the early 18th Century, Palazzo Pitti was considered the most opulent palace in Europe.

BBC: Florence??s best-kept secret