Le saviez vous guide

Did you know? You can take free courses at the Collège de France, opposite the Sorbonne.

If you suddenly feel like sitting in on a course at the Collège de France, it’s possible! Since 1530, teaching there has been free and open to everyone, making knowledge more accessible. So, ready to explore the mysteries of the atom or the Mesopotamian civilization?

Saint-Quentin-en-Yvelines: the surprising origin of its name

The name of Saint-Quentin-en-Yvelines, this vast agglomeration in the Yvelines about 20 km southwest of Paris, derives from a small medieval chapel dedicated to a 3rd‑century Roman martyr. A story that few Île-de-France residents know. Here's the story.

Did you know? There used to be another geode, just like the one at La Villette, in La Défense.

Have you ever noticed the spherical silhouette on the La Défense esplanade? From 1992 to 2000, this Dome housed the world’s largest IMAX theater, delivering total immersion for film buffs. A chapter that would not last more than eight years...

Did you know? The oldest basketball court in the world is in Paris.

In the 9th arrondissement of Paris, at the heart of the YMCA’s historic site, the gym on Rue de Trévise houses the oldest basketball court in the world kept in its original condition. Opened in 1893, this heritage site chronicles the beginnings of basketball in Europe.

These remains of a Gallo-Roman sanctuary concealed a nymphaeum in the Yvelines.

At the heart of the Vaucouleurs valley, the village of Septeuil conceals a rare relic from Roman Gaul: a monumental nymphaeum. Erected to honor a sacred spring, this ancient sanctuary offers an exceptional testimony to water-related devotional rites in Île-de-France.

Why did the Liège station on Line 13 change its name after the war?

Liège station stands apart from any other. With its asymmetric platforms and murals celebrating Belgium, this stop on Line 13 hides a turbulent history, a symbol of a heroic resistance that operated part-time for years.

Did you know? You can acquire a genuine Paris paving stone for about ten euros.

What if you left Paris with a real piece of the City of Light tucked into your suitcase? It’s possible!

This secret royal chapel is a true hidden gem tucked away in a château in Seine-et-Marne.

At the Château de Fontainebleau, in Seine-et-Marne, a royal chapel remains hidden from most visitors. The Lower Chapel of Saint-Saturnin, built under Francis I, only reveals itself on rare occasions — we tell you everything.

The Collège des Bernardins: one of the oldest medieval buildings in Paris to visit free of charge

Let's discover the Collège des Bernardins - one of the oldest medieval buildings in Paris. Be sure to visit this 13th-century gem, located in the heart of the Latin Quarter and open to the public free of charge. Open all year round, this cultural space offers a variety of exhibitions and events, and even a café-restaurant.

This flower-filled park in the Yvelines hides an arboretum, royal secrets, and has inspired Blake and Mortimer.

In Buc, in the Yvelines, the park of Haut-Buc Castle is freely accessible year-round. A pedagogical arboretum, Louis XIV’s secret child, an eccentric astronomer, and the backdrop for Blake and Mortimer: this estate has more than one story to tell. Here’s more about this superb place in full bloom, a must for tulip lovers.

This keep in Essonne is a miniature replica of Philippe Auguste's medieval Louvre.

Did you know? The keep of the Château de Dourdan, in Essonne, was built on the same model as Philippe Auguste’s medieval Louvre. Just 44 km from Paris, this listed monument is open to visitors year-round.

Yvelines: where does the name of this 78-numbered department, formerly known as Seine-et-Oise, come from?

The Yvelines department (78), located to the west of Paris in Île-de-France, bears a name with surprisingly medieval roots. A vanished forest, ancient Latin, and a Versailles-born poet are behind this appellation, adopted by the National Assembly in 1968 to replace Seine-et-Oise. Here’s the full story.

Why is this little-known Montmartre house guarded by two imperial eagles?

Under the shadow of the famous Maison Rose, Rue de l'Abreuvoir hides a shrine in honor of Napoleon. Guarded by two majestic imperial eagles, this house was once the home of a historian obsessed with the emperor—a historically offbeat stop that challenges Montmartre’s bohemian image.

World Unicorn Day: So, where does this legendary creature actually come from?

She spews glitter, smells of roses, leaves flowers and rainbows in her wake: the unicorn is kids’ favorite legendary creature. Having made a strong comeback in pop culture in recent years, the unicorn remains an object of eternal fascination. On the occasion of World Unicorn Day, this Thursday, April 9, 2026, let’s explore its origins together.

These archaeological remains of a Gallo-Roman villa can be visited on a campus in Essonne.

In Yvelines, you can climb to the top of this tower for a sweeping view of the medieval town.

Rising 25 metres above the Yvelines, Houdan's keep hides a history as solid as it is unusual. A survivor from the 12th century, this stone colossus weathered demolition by being transformed into a functional water tower for nearly a century. An architectural curiosity that today offers an exceptional panorama of the medieval town.

The only medieval keep with buttresses in Île-de-France is located in the Yvelines.

In Yvelines, at Maurepas, the remains of a 20-meter-high cylindrical keep stand as the sole remnant of a medieval fortress from the 12th century. Recognized as a historic monument since 1926, it still holds the secrets of a turbulent past. Here’s the story.

Did you know? Why do we indulge in chocolate during Easter celebrations?

It’s a well-known fact: sweet lovers and connoisseurs indulge in kilos of chocolate during Easter celebrations in 2026. But do you really know where this tradition comes from? Here's what you need to know.

This iconic stadium of French football conceals the ruins of a 12th-century church in the Yvelines

Behind the iconic gates of the National Football Center lies a surprising history that extends far beyond the sport. Long before it became the training ground for France’s national team, the Clairefontaine estate has endured centuries of change—from an English hunt pavilion to a war wounded refuge—while still preserving remnants of a 12th-century church.

Heritage: What exactly is a "Remarkable Garden"? Where does this prestigious label come from?

If you enjoy strolling through Paris and the Île-de-France region, you've probably already come across the "Remarkable Garden" sign. But what exactly does this label signify? Here's what you need to know.