Piazza San Lorenzo is a city square in Florence, Italy, with the Basilica of San Lorenzo, Florence situated at the centre.

The basilica is one of the oldest in Florence, having been consecrated in 393 AD,[1] at which time it stood outside the city walls.

For three hundred years it was the city's cathedral, before the official seat of the bishop was transferred to Santa Reparata.

The square is frequented by tourists who cross it to access the basilica complex and by the nearby Central Market and souvenir stalls.

Since August 2013, the city has started a project to remove the benches aimed both at restoring the historic architecture, and at introducing the passage of a connecting bus between Via Camillo Cavour and the Santa Maria station.