Torre della Gabbia

Between the ducal square and the market quarter, a tall medieval brick tower carries the strangest ornament in Mantua: a rectangular iron cage fixed high on its wall, once used as an open-air prison. Its silhouette and grim history are part of the story of Mantua’s civic past.

Why it matters

The Torre della Gabbia is one of the most recognisable verticals in Mantua's historic centre, rising over the Acerbi palace on the street that joins the ducal square to the market quarter. It belongs to the earliest layer of the city's communal history: the tower was built in the thirteenth century by the Acerbi family and soon passed into the hands of the Bonacolsi, the lords who ruled Mantua before the Gonzaga. Later remade with a Renaissance facade, it then acquired the feature that renamed it.

In 1576 Duke Guglielmo Gonzaga had a large iron cage mounted on the tower to serve as a genuine prison, hung in full public view. Condemned prisoners were exposed there in the sight of the whole city — a punishment designed as much for the crowd below as for the captive above. No other monument in Mantua compresses the city's medieval justice so brutally into a single image.

What to notice

The cage is an iron lattice box mounted partway up the tower shaft, roughly two metres long and about a metre deep and high. The facade facing the street was remodelled in the sixteenth century in Renaissance style, with marble lesene and decorative work associated with the school of Mantegna, layered over the plain medieval brick.

The cage contrasts with Mantua’s bell towers and the astronomical clock of Piazza delle Erbe: it embodies public authority and punishment rather than civic pride or courtly learning.

Context and history

The tower's thirteenth-century origins lie with the Acerbi family, and encyclopaedic accounts record its sale to the Bonacolsi in 1281, after which it served their lordship of the city. Ownership later returned to princely hands: in the sixteenth century Francesco Gonzaga assigned the tower and its adjoining palace to the Guerrieri Gonzaga family, and the property changed hands again in the nineteenth century before coming to the city.

The cage gave the tower its present name and its place in local memory: accounts describe pickpockets and other condemned prisoners displayed in it, sometimes for weeks. In 1798 the then owner was ordered to destroy the cage as a symbol of tyranny, yet it survived — reportedly kept on as a curiosity. The 2012 Emilia earthquakes shook the structure, dislodging bricks and opening cracks, and a restoration project launched in 2017 has since consolidated the fabric. The tower also contains a Bonacolsi-family chapel with fourteenth-century frescoes in the Giotto-school manner.