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Montlhéry () is a commune in the
Essonne Essonne () is a department in the southern part of the ÃŽle-de-France region in Northern France. It is named after the river Essonne. In 2019, it had a population of 1,301,659, across 194 communes.department in
ÃŽle-de-France The ÃŽle-de-France (; ; ) is the most populous of the eighteen regions of France, with an official estimated population of 12,271,794 residents on 1 January 2023. Centered on the capital Paris, it is located in the north-central part of the cou ...
in northern
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
. It is located from
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
.


History

Montlhéry lay on the strategically important road from Paris to
Orléans Orléans (,"Orleans"
(US) and
Merovingians The Merovingian dynasty () was the ruling family of the Franks from around the middle of the 5th century until Pepin the Short in 751. They first appear as "Kings of the Franks" in the Roman army of northern Gaul. By 509 they had united all the ...
, it was owned by the church in
Reims Reims ( ; ; also spelled Rheims in English) is the most populous city in the French Departments of France, department of Marne (department), Marne, and the List of communes in France with over 20,000 inhabitants, 12th most populous city in Fran ...
and in 768 it was given to the abbey of St. Denis in Paris. It was the site of a number of battles between the lords of Montlhéry and the early Capetian monarchy. The Montlhéry noble house was related to the Montmorency family; Thibaud, the founder of the Montlhéry dynasty, was the brother of Bouchard II, the progenitor of the Montmorency house. Thibaud ruled from 970 to 1031 and was succeeded by his son Guy I, who ruled until 1095. Guy I's children married into other local noble families: his daughter Melisende married Hugh,
count of Rethel The first rulers of Rethel might have governed under the Abbey of Saint-Remi and later independently, before the county passed first to the counts of Nevers, then to the counts of Flanders, and finally to the dukes of Burgundy. In 1405 the coun ...
, and another daughter Elizabeth married Joscelin of Courtenay. Through these marriages and subsequent Montlhéry participation on the
First Crusade The First Crusade (1096–1099) was the first of a series of religious wars, or Crusades, initiated, supported and at times directed by the Latin Church in the Middle Ages. The objective was the recovery of the Holy Land from Muslim conquest ...
, Guy I was the ancestor of the ruling dynasties of the crusader
Kingdom of Jerusalem The Kingdom of Jerusalem, also known as the Crusader Kingdom, was one of the Crusader states established in the Levant immediately after the First Crusade. It lasted for almost two hundred years, from the accession of Godfrey of Bouillon in 1 ...
and the
County of Edessa The County of Edessa (Latin: ''Comitatus Edessanus'') was a 12th-century Crusader state in Upper Mesopotamia. Its seat was the city of Edessa (modern Şanlıurfa, Turkey). In the late Byzantine period, Edessa became the centre of intellec ...
. Another daughter, Alice, married into the Le Puiset family, and a son, Guy, became count of Rochefort. Guy I was succeeded by Milo I, followed by Milo's sons Guy II and Milo II. In 1118, after many disputes with the rebellious lords,
Louis VI of France Louis VI (1 December 1081 – 1 August 1137), called the Fat () or the Fighter (), was List of French monarchs, King of the Franks from 1108 to 1137. Like his father Philip I of France, Philip I, Louis made a lasting contribution to centralizing ...
ordered the castle to be dismantled and turned the town into a royal residence. Louis VI had himself been married to a granddaughter of Guy I, Lucienne of Rochefort, from 1104 to 1107. After being absorbed into the royal domain, Montlhéry became part of the territory governed by the viscount of Paris. In the early 13th century, the French king Philip II (Augustus) completely rebuilt the castle in the contemporary style, at a new site high above the town. During the
Hundred Years' War The Hundred Years' War (; 1337–1453) was a conflict between the kingdoms of Kingdom of England, England and Kingdom of France, France and a civil war in France during the Late Middle Ages. It emerged from feudal disputes over the Duchy ...
, the town and the castle frequently passed between English and French forces. On 16 July 1465,
Charles the Bold Charles Martin (10 November 1433 – 5 January 1477), called the Bold, was the last duke of Burgundy from the House of Valois-Burgundy, ruling from 1467 to 1477. He was the only surviving legitimate son of Philip the Good and his third wife, ...
defeated
Louis XI of France Louis XI (3 July 1423 – 30 August 1483), called "Louis the Prudent" (), was King of France from 1461 to 1483. He succeeded his father, Charles VII. Louis entered into open rebellion against his father in a short-lived revolt known as the ...
at the
Battle of Montlhéry The Battle of Montlhéry was fought between Louis XI and the League of the Public Weal on 16 July 1465 in the vicinity of Longpont-sur-Orge. It had no clear winner and therefore did not decide the war. Insurgency of the Vassal countries Philip t ...
. The town was left in ruins by the Wars of Religion, but it was rebuilt in 1591 under Henry IV. In the 19th century, the tower was used for scientific experiments. In 1822,
François Arago Dominique François Jean Arago (), known simply as François Arago (; Catalan: , ; 26 February 17862 October 1853), was a French mathematician, physicist, astronomer, freemason, supporter of the Carbonari revolutionaries and politician. Early l ...
calculated the
speed of sound The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elasticity (solid mechanics), elastic medium. More simply, the speed of sound is how fast vibrations travel. At , the speed of sound in a ...
there; a
cannon A cannon is a large-caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during th ...
ball shot at the tower was observed from the Observatory of Villejuif. In 1823,
Claude Chappe Claude Chappe (; 25 December 1763 – 23 January 1805) was a French inventor who in 1792 demonstrated a practical semaphore line, semaphore system that eventually spanned all of France. His system consisted of a series of towers, each within l ...
installed a relay for the Paris-
Bayonne Bayonne () is a city in southwestern France near the France–Spain border, Spanish border. It is a communes of France, commune and one of two subprefectures in France, subprefectures in the Pyrénées-Atlantiques departments of France, departm ...
telegraph Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas ...
line. On 5 June 1874, Alfred Cornu tried to calculate the
speed of light The speed of light in vacuum, commonly denoted , is a universal physical constant exactly equal to ). It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time i ...
between the tower and the Observatory in Paris. During the
Franco-Prussian War The Franco-Prussian War or Franco-German War, often referred to in France as the War of 1870, was a conflict between the Second French Empire and the North German Confederation led by the Kingdom of Prussia. Lasting from 19 July 1870 to 28 Janua ...
, the town was occupied and pillaged by the
Prussia Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...
ns. It was occupied again by
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
in 1940 during the
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. Today Montlhéry is twinned with Stetten am kalten Markt,
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
.Partnerstädte Stetten am kalten Markt
/ref>


Population

Inhabitants of Montlhéry are known as ''Montlhériens'' in French.


Château de Montlhéry

The Château de Montlhéry, a 13th-century castle with its prominent
keep A keep is a type of fortified tower built within castles during the Middle Ages by European nobility. Scholars have debated the scope of the word ''keep'', but usually consider it to refer to large towers in castles that were fortified residen ...
, succeeded a castle built in the 11th century, and an earlier foundation, built from 991 to 1015.


List of lords of Montlhéry

* Thibaud of Montmorency (970-1031) *
Guy I of Montlhéry Guy I (died 1095) was the second lord of Bray-sur-Seine, Bray and the second lord of Montlhéry (Latin: ''Monte Leterico''). He was the son of Milo of Montlhéry. He married Hodierna of Gometz, sister of William, lord of Gometz-le-Châtel, Gometz. ...
(1031–1095) * Milo I of Montlhéry (1095–1102) * Guy II of Montlhéry (1102–1109) * Milo II of Montlhéry (1109–1118) *''passes to royal domain of France''


Economy

South of Montlhéry (on the communes of Linas and Bruyères-le-Châtel) is the site of an
automobile A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, peopl ...
race track A race track (racetrack, racing track or racing circuit) is a facility built for racing of vehicles, athletes, or animals (e.g. horse racing or greyhound racing). A race track also may feature grandstands or concourses. Race tracks are also us ...
, the '' Autodrome de Montlhéry'', established by Alexandre Lamblin in 1924. It is sometimes referred to as the 'French
Indianapolis Indianapolis ( ), colloquially known as Indy, is the List of capitals in the United States, capital and List of municipalities in Indiana, most populous city of the U.S. state of Indiana and the county seat of Marion County, Indiana, Marion ...
', because it is laid out as a high speed
oval An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas of mathematics (projective geometry, technical drawing, etc.), it is given a more precise definition, which may inc ...
. Many speed records were set there within months of its opening. Today the racetrack has fallen into disuse and is also used for other purposes including a variety of automobile meetups. Montlhéry was also a
market town A market town is a settlement most common in Europe that obtained by custom or royal charter, in the Middle Ages, a market right, which allowed it to host a regular market; this distinguished it from a village or city. In Britain, small rura ...
, which is remembered today in the Tomato Festival. The medieval tower is also a popular tourist attraction, which recently re-opened in 2005 after being closed for repairs.


Personalities

* Henri Oreiller, was an alpine ski racer and Olympic gold medallist from France. * Paul Fort, nicknamed ''Le Prince des Poètes'', lived there from 1921 until his death in 1960.


See also

*
Communes of the Essonne department The following is a list of the 194 communes of the Essonne department of France. The communes cooperate in the following intercommunalities (as of 2025):History and Archaeology of the Castle, on Montlhéry.com
*


External links

*
City council website
(in French)

*
Mayors of Essonne Association
{{DEFAULTSORT:Montlhery Communes of Essonne