Torre della Zecca, Medieval defense tower in Florence, Italy

The Torre della Zecca is a medieval tower in Florence standing at a road junction near the Arno River, forming part of the city's former eastern defenses. The structure is built from stone with multiple levels and windows characteristic of military towers from that era.

The tower was built to protect the never-completed Ponte Reale, planned before the flood of 1333 and named after Robert of Anjou, and to close the city walls on the Arno. In the Laurentian era it was one of two munition towers of the Florentine Republic, with gunpowder stored in the highest room and saltpetre in the damp cellars. In 1532 it was lowered and incorporated by Antonio da Sangallo the Younger into the Mongibello bastion for Duke Alessandro de' Medici. It later took its name from the nearby mint mills.

The tower takes its name from the Zecca Nuova mills, opened nearby in the second half of the 16th century, after the arsenal moved to the Fortezza da Basso. Before that, the mint stood under the Loggia della Signoria, where the Scheraggio stream drove the coin hammers. A local tale held that coins buried in the tower's cellars could sprout into trees of gold florins, which earned the spot the nickname of a second Campo dei Miracoli, linked to Pinocchio's story.

The tower stands on its own in the middle of the Piazza Piave road junction on the viali di Circonvallazione, by the lungarno della Zecca Vecchia, so it is reached on foot across the crossings. It was restored between 2013 and 2016 and is now open to the public. The terrace is reached only by a narrow stone staircase.

The tower's lower rooms once held the mint's water-driven coin hammers, fed by the Pescaia di San Niccolò; a local tale held that buried coins could sprout into trees of gold florins, which made this stretch of the Lungarno della Zecca Vecchia a candidate for Collodi's Field of Miracles in Pinocchio.