The Florence City Walls once formed a continuous defensive boundary around the medieval city. Gates controlled the principal roads into Florence, while long stretches of stone wall separated the densely built historic centre from villas, fields and settlements beyond.
Much of that landscape disappeared during the nineteenth century. When Florence became capital of the Kingdom of Italy in 1865, architect Giuseppe Poggi prepared an ambitious plan for a modern expanding city. Large sections of the medieval walls north of the Arno were demolished and replaced by the broad Viali di Circonvallazione.
Main period: Medieval Florence to the 19th century
Major transformation: Demolition of much of the northern wall circuit
Key planner: Giuseppe Poggi
Replacement: Viali di Circonvallazione
Surviving gates: Porta San Gallo, Porta alla Croce and Porta al Prato
Best-preserved walls: Mainly south of the Arno
Why it matters: The Viali still trace much of the former boundary of medieval Florence
This article focuses specifically on the relationship between the medieval fortifications and the modern avenues. For the wider urban transformation, see How Firenze Capitale Transformed Florence and our Florence as Capital of Italy – Firenze Capitale 1865–1871.
Florence Was a Walled City for Centuries
Florence developed several defensive circuits as the city expanded during the Middle Ages. Each major phase of urban growth pushed the boundary farther outward.
The later medieval wall circuit enclosed a much larger area than the earlier fortifications. Towers, gates and long stretches of masonry protected the city and controlled movement between Florence and the surrounding countryside.
The walls were not merely military structures. They shaped everyday life. Roads converged on the gates, commerce developed around important entrances and the fortifications created a clear physical distinction between the city and the landscape beyond.
The wider history of these defensive systems is explored in our Florence City Walls and Fortresses – Complete Guide.
For centuries, Florence was not simply a city with walls around it. The walls helped define where Florence ended, how people entered it and where new development could occur.
What the Florence City Walls Looked Like Before 1865
Before the great transformation of the 1860s, a traveller approaching Florence would still encounter a city whose historic centre was strongly defined by fortifications.
Important roads entered through monumental gates. On the northern and eastern sides, walls stretched across areas now occupied by broad avenues and busy squares.
Beyond them lay a more open landscape of villas, gardens, agricultural land and smaller settlements.
The fortifications therefore marked not only a defensive line but also the physical edge of urban Florence.
Why Were the Florence City Walls Demolished?
The decisive change came when Florence was chosen as the capital of Italy.
The city needed to expand rapidly. Government offices, new residents, services and improved transport required more space and easier movement between the historic centre and developing areas beyond it.
Giuseppe Poggi’s plan treated large parts of the old fortifications as obstacles to this expansion. Extensive sections north of the Arno were therefore demolished.
The decision reflected nineteenth-century priorities. Defensive walls were increasingly regarded as obsolete infrastructure that restricted circulation and urban growth.
For the reasons behind the demolition in greater detail, see Why Florence Demolished Its Medieval City Walls.
Florence was not alone. Across nineteenth-century Europe, obsolete fortifications were being removed as cities expanded and new boulevards replaced older defensive boundaries.
Giuseppe Poggi’s Plan for a Modern Florence
Giuseppe Poggi was entrusted with creating a modern urban framework for the new capital.
His vision extended far beyond the removal of the walls. He proposed new residential districts, improved circulation, broader roads and a completely different relationship between historic Florence and the surrounding city.
North of the Arno, demolishing the fortifications allowed him to create the Viali di Circonvallazione.
South of the river, where the topography was very different, he largely retained the walls and developed the panoramic Viale dei Colli instead.
The contrast between these two approaches remains visible today.
The Birth of the Viali di Circonvallazione
The Viali di Circonvallazione replaced much of the demolished wall circuit north of the Arno.
Broad and tree-lined, these avenues created a new circulation route around the historic centre. Instead of encountering a defensive barrier, residents could move along a modern urban system connecting new districts and major roads.
The transformation fundamentally changed Florence’s geography.
The former wall line ceased to function as a barrier, yet it continued to mark the transition between the compact historic centre and the expanding modern city.
Study a map of Florence and follow the broad arc of the Viali around the northern and eastern sides of the historic centre. Their route still makes the old boundary surprisingly easy to recognise.
From Defensive Wall to Urban Boulevard
The conceptual change was enormous.
For centuries, the walls had been designed to restrict movement. They directed travellers through controlled gateways and physically separated the city from its surroundings.
The new avenues served almost the opposite purpose.
They encouraged circulation, connected neighbourhoods and opened Florence towards future expansion.
A defensive boundary became a transportation corridor.
The Viali are one of the clearest examples of how Florence changed from a medieval walled city into a modern European urban centre.
What Happened to the Medieval Gates?
Fortunately, the demolition did not remove every trace of the old fortifications.
Several major gateways survived even after the walls connecting them disappeared.
This explains one of the most unusual features of modern Florence: monumental medieval gates standing alone in large squares or beside busy roads.
Originally, these structures were openings in a continuous defensive system. Once the adjoining walls vanished, they acquired a new role as historic monuments within the modern city.
Our guide to the Historic Gates of Florence – From Porta Romana to San Niccolò explores the surviving entrances in greater detail.
Porta San Gallo and Piazza della Libertà
One of the most striking examples is Porta San Gallo.
The gate once controlled an important northern route into Florence. Today it stands within the much larger urban setting of Piazza della Libertà.
The contrast is revealing. The medieval structure belongs to the fortified city, while the surrounding space reflects nineteenth-century expansion.
Standing beside the gate makes it much easier to imagine the former wall continuing outward from either side.
Porta alla Croce and Piazza Beccaria
Another excellent example is Porta alla Croce, now standing in Piazza Beccaria.
Before Poggi’s redevelopment, the gate formed part of the eastern defensive boundary. After the adjoining walls were demolished, it remained as an isolated landmark.
The large surrounding square belongs to a completely different urban scale from the narrow medieval streets inside the former walls.
This makes Piazza Beccaria one of the best places to understand physically how Firenze Capitale changed Florence.
Approach Piazza Beccaria from the Santa Croce district. The transition is striking: narrow historic streets suddenly open into a broad nineteenth-century urban space centred on a surviving medieval gate.
Porta al Prato and the Western Side of Florence
Porta al Prato also survived the demolition of the surrounding fortifications.
Its location marked an important western entrance into Florence. Today, the gate stands within a modern transport environment, making its original defensive role less obvious.
Yet its survival provides another useful reference point for reconstructing the former wall circuit.
Together, Porta San Gallo, Porta alla Croce and Porta al Prato allow visitors to trace important parts of a defensive boundary that has otherwise largely disappeared north of the Arno.
Why Were the Walls Preserved in Oltrarno?
The story was different south of the Arno.
Poggi did not apply the same extensive demolition programme to the hilly Oltrarno landscape.
Topography played an important role. The southern side of Florence rises rapidly into hills, creating very different planning challenges from the flatter northern side.
Instead of replacing the walls with another ring of broad boulevards, Poggi created the Viale dei Colli and worked more closely with the existing terrain.
As a result, substantial stretches of Florence’s historic fortifications remain much easier to recognise south of the river.
Where Can You Still See Florence’s Walls?
Some of the most evocative surviving sections can be found in the Oltrarno.
Around San Niccolò, the hillside and surviving defensive structures preserve a stronger sense of Florence as a fortified city.
Other sections can be followed towards Forte Belvedere and the routes leading towards Porta Romana.
These areas offer an important contrast with the Viali di Circonvallazione.
On one side of the Arno, substantial elements of the defensive landscape remain visible. On the other, the old wall line has largely become avenues, squares and isolated gates.
Nearby Porta San Niccolò is one of the best surviving reminders of the city’s medieval fortifications.
The Walls Have Not Completely Disappeared
Even where the walls are no longer visible above ground, archaeological remains survive beneath modern Florence.
Excavations along the route of the Viali have revealed sections of medieval masonry associated with the fortifications demolished during the nineteenth century.
This provides physical confirmation of the close relationship between the modern avenues and the former defensive circuit.
A busy road can therefore conceal the remains of the medieval city only a short distance below modern street level.
The former walls are not only lines reconstructed from historic maps. Parts of the fortifications still survive underground beneath modern Florence.
The Viali Changed How Florence Expanded
The new avenues did more than improve circulation.
Once the defensive walls disappeared, development could spread outward much more easily. New neighbourhoods emerged beyond the old city boundary, and areas previously outside Florence became increasingly integrated into the urban fabric.
Poggi’s plan therefore helped establish the basic structure for later growth.
The city no longer expanded from gate to gate through a fixed defensive perimeter. Streets and neighbourhoods could now extend more freely into the surrounding landscape.
A Much Larger Florence
The transformation was administrative as well as architectural.
Florence required more territory to accommodate population growth and future development. Areas outside the historic centre became increasingly connected with the municipality and its urban infrastructure.
This process contributed to the emergence of a much larger Florence.
The old city had been physically concentrated within a clear fortified boundary. Modern Florence increasingly extended across a much wider territory.
What Was Lost?
From a modern heritage perspective, the scale of the demolition is difficult to ignore.
The walls had survived for centuries and formed one of the defining architectural features of medieval Florence.
Their destruction removed a major part of the city’s historic fabric and permanently altered the relationship between the centre and surrounding neighbourhoods.
Had they survived, Florence would look radically different today.
At the time, however, many planners regarded defensive walls as obsolete infrastructure preventing efficient expansion.
Poggi’s transformation created modern Florence but also destroyed part of medieval Florence. That tension between urban progress and conservation remains one of the most important themes of nineteenth-century city planning.
What Florence Gained
The demolition also created the framework for a new city.
The Viali di Circonvallazione improved connections around the historic centre and allowed developing neighbourhoods to link more easily with one another.
Open spaces around the preserved gates created new urban landmarks, while removing the continuous defensive barrier allowed Florence to expand outward.
Modern Florence is therefore the product of both loss and transformation.
The Viali Are the Ghost of the Medieval Walls
Perhaps the most useful way to understand the Viali di Circonvallazione is to think of them as the urban ghost of the old fortifications.
The physical walls have largely vanished north of the Arno, but their route still shapes movement through Florence.
Cars, buses, bicycles and pedestrians now circulate where stone defences once separated the city from the countryside.
The function changed completely, yet the historical boundary survived in a new urban form.
How to Explore the Former Wall Circuit
A good starting point is Piazza della Libertà at Porta San Gallo.
From there, follow the Viali towards the east and southeast. Their scale immediately gives a sense of the space created when the fortifications were removed.
Continue towards Piazza Beccaria, where Porta alla Croce forms another major surviving landmark.
From there, walk towards the Arno and cross into the Oltrarno. Around San Niccolò, surviving defensive structures make the medieval wall landscape much easier to imagine.
Combine a section of the Viali di Circonvallazione with the surviving walls around San Niccolò. Within the same city, you can compare Poggi’s modern boulevard solution with fortifications that escaped demolition.
Why the Florence City Walls Still Matter
The Florence City Walls still matter because they explain the basic structure of modern Florence.
The city appears at first to be dominated by its medieval and Renaissance past, yet its present geography also reflects a dramatic nineteenth-century decision to open the historic centre and connect it with expanding neighbourhoods.
The Viali di Circonvallazione are among the clearest surviving expressions of that decision.
They show where the old city ended, reveal how Florence expanded during the era of Firenze Capitale and explain why several medieval gates now stand isolated from the walls they once protected.
Once you understand their history, travelling along the Viali becomes a very different experience. Beneath modern traffic lies the boundary that defined Florence for centuries.
Florence’s medieval walls largely disappeared north of the Arno, but their line still survives in the structure of the modern city.
Further Reading on Firenze Casa
Continue exploring Florence’s fortifications and the nineteenth-century transformation of the city:
- Florence as Capital of Italy – Firenze Capitale 1865–1871
- How Firenze Capitale Transformed Florence
- Why Florence Became the Capital of Italy in 1865
- Florence City Walls and Fortresses – Complete Guide
- Why Florence Demolished Its Medieval City Walls
- The Historic Gates of Florence – From Porta Romana to San Niccolò
- Porta San Niccolò – Florence’s Surviving Medieval Tower
- Piazzale Michelangelo and Giuseppe Poggi
References
- Treccani – Firenze, Enciclopedia Italiana
- Treccani – Giuseppe Poggi
- Comune di Firenze – Historical Documentation on Firenze Capitale
- Comune di Firenze – Historical Documentation on the Viali di Circonvallazione
- Archivio di Stato di Firenze – Historical Documentation on the City Walls and Firenze Capitale
- Poggi, Giuseppe – Sui lavori per l’ingrandimento di Firenze, 1864–1877
- Fanelli, Giovanni – Firenze, architettura e città
