Brunelleschi's Dome
The cathedral's dome, begun in 1420 and still the largest masonry dome ever built at 45.5 metres across. The cathedral had stood open to the sky for decades because nobody knew how to close a span that wide. Brunelleschi's answer was two shells, one inside the other, tied by twenty-four ribs and built without the wooden centering that would normally hold an arch up.
The Baptistery and the Gates of Paradise
The octagonal baptistery opposite the cathedral, older than almost everything around it, carrying Ghiberti's gilded bronze east doors. He started them in 1425 and finished twenty-seven years later, twelve years modelling and casting and fifteen more chasing and gilding. Michelangelo is credited with the nickname. What you see outside is a replica; the originals are indoors.
Palazzo Vecchio
The fortified town hall, and the seat of a republic that spent most of its history arguing about whether it was one. The tower is off-centre because it was built onto an existing structure rather than designed whole. Cosimo I moved the ducal household in and then out again, which is the reason the Vasari Corridor exists at all.
The Uffizi
Purpose-built in the 1560s as government offices, which is precisely what uffizi means, and only later filled with the Medici collection. The building's long thin U-shape follows its bureaucratic origins rather than any gallery logic. It is a filing cabinet that became one of the most important art collections in the world.
The Vasari Corridor
An enclosed passage of 1565 running one storey up from the Palazzo Vecchio through the Uffizi, over the Ponte Vecchio and on to the Pitti Palace, so that Cosimo I could cross his own city without meeting anyone in it. It runs above shopfronts and through a church gallery. The whole point of it was avoiding the street.
Ponte Vecchio
The shop-lined bridge over the Arno, occupied by jewellers because of a smell complaint. Butchers and fishmongers worked here until 1593, when Ferdinando I evicted them by decree on the grounds that the stench was unacceptable beneath the Medici's private corridor. Goldsmiths replaced them and the decree has never been repealed.
Palazzo Pitti and the Boboli Gardens
The enormous palace the Medici bought from a rival family and then expanded until it dwarfed anything the original owners had imagined, with formal gardens climbing the hill behind. Buying a competitor's house and making it bigger was the point. The gardens were among the earliest of their kind and set a template later copied at Versailles.
Basilica di Santa Croce
The Franciscan church where Michelangelo, Galileo and Machiavelli are buried, which makes it a national pantheon as much as a place of worship. The Dante monument here is a cenotaph raised in 1829 in the expectation that Ravenna would eventually hand the body back. It never has, and the tomb has stood empty ever since.
The Medici Chapels
The family's mausoleum behind San Lorenzo, including the New Sacristy that Michelangelo designed and populated with his own sculpture. The scale is the tell: a merchant banking family building itself a burial complex on the scale of a royal house. It is the clearest physical statement of what the money was ultimately for.
Galleria dell'Accademia
Home to Michelangelo's David, moved indoors in 1873 after centuries outside in the Piazza della Signoria. The statue was carved from a block other sculptors had already worked and abandoned as ruined. What most visitors miss is the corridor of unfinished Michelangelo slaves on the way in, figures still half inside their stone.
Orsanmichele
A grain market converted into a church, its exterior niches filled with statues commissioned by the individual guilds, each one paying for its own patron saint in a visible competition. This is the economy of Florence rendered as sculpture: wool, silk, bankers and armourers, each buying frontage on the same building.
Santo Spirito
Brunelleschi's church across the river, finished after his death, with a facade left deliberately blank. The interior is the more rigorous piece of architecture he built, a demonstration of proportion carried through without decoration. The square outside is where the neighbourhood actually lives, which is increasingly rare this close to the centre.