Fenestrelle Fort
All you need to know about the largest alpine fortress in Europe

Before my first visit, I thought we were heading to see some half-ruined military structure. Instead, we suddenly found ourselves completely alone inside a massive complex: the largest alpine fortress in Europe.

Fenestrelle Fortress isn’t just huge – it’s actually the second-largest stone fortification in the world, right after the Great Wall of China. And it’s tucked away in the middle of the Piedmont Alps!

Since I live just 40 minutes away, this place has become a must-visit for all my guests. It’s always right at the top of the to-do list and yes, I’ve been there many, many times.

Find here everything you need to plan your own visit to the fortress in the stunning Val Chisone, including tips, photos, and my honest take on what to expect.

Visiting Fenestrelle Fortress

This place is absolutely massive! You can really only grasp the full scale of the fortress from a distance or from the opposite side of the valley.

On my first visit, I was honestly a bit disappointed to find that only a tiny section of Europe’s largest fortress is accessible without a guided tour.

But on my second trip, I did the self-guided “Amici Tour”, which I now recommend it to everyone.

Exploring Fenestrelle Fortress Without a Tour

The freely accessible area is limited to the central section, Fort San Carlo, which is the heart of the fortress.

Still, you can see many of the most important buildings here, at least from the outside, and in some cases even inside: the Governor’s Palace, officers’ quarters, the church, various storage buildings, an old laboratory, a large powder tower, and even a historic pharmacy.

From the parking lot, a bridge leads directly to the former parade ground. On the right-hand side, you’ll find the old officers’ palace, which now houses the small ticket counter and a free mini-museum with memorabilia from the 3rd Alpine Regiment, stationed here from 1887 until the end of World War I.

Self-Guided “Amici Tour”

If you want to see more than just the courtyard and a few rooms of the officers’ palace without joining a guided tour, your only option is the “De Amicis” ticket.

For just €3.00 per person, you can follow a marked circular route through a small section of Fort San Carlo on your own.

This walk even includes a short stretch of the covered staircase, which is normally off-limits unless you’re on a tour. That alone makes the small fee absolutely well worth it.

Since the tours described in the next section are only offered in Italian, I highly recommend the Amici Tour as a way to at least get a real feel for the scale of the fortress.

Visiting Fenestrelle Fortress with a Guided Tour

If you want to explore more than just a small part of Fort San Carlo, you’ll need to join a guided tour in Italian. The rest of Europe’s largest fortress, including additional buildings and interior spaces, is only accessible this way.

I haven’t taken one of these tours myself yet, simply because my Italian isn’t quite good enough to follow along.

There are three tour options available:

1) Short Tour – 1 hour (€10.00 per person)
Daily at 10:00 AM and 3:00 PM (or 2:30 PM in winter)
Focus: The main buildings inside Fort San Carlo

2) Medium Tour – 3 hours (€15.00 per person)
Daily at 10:00 AM and 3:00 PM (or 2:30 PM in winter)
Includes: Fort San Carlo, Fort Tre Denti, and part of the tunnel system

3) Full Tour “La Passeggiata Reale” – 7 hours (€20.00 per person)
Daily at 9:00 AM
Covers the entire fortress complex, including all 4,000 steps up to Fort Delle Valli

Opening hours Fenestrelle Forts

The only are open to the public is Fort San Carlo, the Fortress next to the parking lot. You are not able to visit the other forts and buildings without a guided tour. The gate and the ticket office of San Carlo Fortress are open as follows:

Summer (July & August):
Every Day from 09:00 – 13:00 and 14:30 – 18:00hrs

Winter (September – June):
Every Day, except Tuesday & Wednesday from 10:00 – 12:30 and 14:30 – 17:00hrs

How to get to Fenestrelle

The parking lot in front of the Fenestrelle fort is very easy to reach and free of charge. The fortress complex is the perfect day trip due to its proximity to Turin.

From Pinerolo, travel and follow the main road “SP 23” in the direction of Sestière. The fortress can be seen from afar.

The road leads below the fortress into the village of Fenestrelle. The small road “Via del Forte” then turns right towards the stronghold and 500m later you have reached the parking lot.

From Turin, the 86 km drive through the beautiful Val Chisone to the largest fortress in Europe takes about 1:15 hours.

All you need to know about the Fenestrelle Fort

The Fenestrelle Fortress (it. Forte di Fenestrelle) towers majestically in the Val Chisone, on the once strategically important route in northern Italy from Piedmont to France.

It is an absolute masterpiece of military architecture, the largest fortress in Europe and correspondingly impressive to look at!

The huge complex extends over almost the entire left side of the valley, covering an area of around 1.3 million square meters.

From the lowest point of the imposing structure at 1100 m above sea level to the highest point at 1800 m above sea level, you have to climb almost 700 meters in altitude. 635 meters to be precise.

The Fenestrelle forts actually consist of three individual fortresses: Fort San Carlo, Fort Tre Denti and Fort Delle Valli.

A tunnel connects these monuments. The longest covered staircase in Europe runs through this tunnel, with almost 4,000 steps.

History (short version)

Construction work on the Fenestrelle fortress began in 1728 and lasted around 120 years.

The engineer Ignazio Bertola built the stronghold to secure the Italian-French border on behalf of the Duke of Savoy, Vittorio Amedeo II as only a few years prior that part of Italy belonged to the French King Louis XIV.

To protect the valley bed from enemy attacks, the Reduit Carlo Alberto replaced the obsolete Fort Mutin, which had stood on this site since 1705 and was in danger of collapsing.

A total of 3 redoubts were built: Fort San Carlo, Fort Tre Denti and Fort Delle Valli. The entire fortification complex is connected by a continuous wall. All parts of the fortress can be reached on dry ground via the covered and internal staircase with approx. 4000 steps (Scala Coperta).

The outer staircase with “only” approx. 2500 steps (Scala Reale) was used by the king during his visits. This royal staircase provides a link between Fort Tre Denti, the Santa Barbara battery, the gate, the hospital and, at the other end, the entrance to Fort delle Valli.

From 1887 until the end of the First World War, the fortress became the garrison of the mountain battalion. With the rise of fascism, it served as a prison for political prisoners.

Famous prisoners included Xavier de Maistre, the author of “Voyage autour de ma chambre” and Cardinal Bartolomeo Pacca, Pope Pius VII’s secretary.

After the end of the Second World War, the Italian army no longer had any use for the Fenestrelle fortress and abandoned it.

Due to weather and looting, the empty buildings fell into disrepair, and it was not until 1984 that the first restoration work was carried out. Since 1990, a volunteer organization has been responsible for the preservation and restoration of the extensive complex.

In 2007, Fenestrelle Fortress was included in the World Monument Fund’s list of the 100 most endangered cultural monuments.