In 1924, Louis de Broglie proposed that all particles behave to an extent like waves.

* 1706 – Louis de Cahusac, French playwright and librettist, and Freemason ( d. 1759 )

* 1644 – Louise de La Vallière, French mistress of Louis XIV of France ( d. 1710 )

de Pompadour, Louis XV's mistress, who was considered the most powerful woman in France at the time.

* 1779 – Louis de Freycinet, French explorer ( d. 1842 )

* 1892 – Louis de Broglie, French physicist, Nobel Prize laureate ( d. 1987 )

* 1767 – Louis Antoine de Saint-Just, French military leader and politician ( d. 1794 )

** Louis de Montfort

In 1752, the French astronomer Nicolas Louis de Lacaille subdivided it into Carina ( the keel, or the hull, of the ship ), Puppis ( the poop deck, or stern ), and Vela ( the sails ).

Antlia was created in 1756 by the French astronomer Abbé Nicolas Louis de Lacaille, who created fourteen constellations for the southern sky to fill some faint regions.

De Amore was written at the request of Marie de Champagne, daughter of King Louis VII of France and of Eleanor of Aquitaine.

Louis de Wohl worked as an astrologer for the British intelligence agency MI5, after it was claimed that Hitler used astrology to time his actions.

* 1713 – Louis, 4th duc de Noailles, French peer and Marshal of France ( d. 1793 )

* Schmidt, Hanns Peter: The Origin of Ahimsa, in: Mélanges d ' Indianisme à la mémoire de Louis Renou, Paris 1968

Toward the latter half of the 17th century, Louis XIV founded his ' Académie Royale de Musique et de Danse ', where specific rules for the execution of every dance and the " five positions " of the feet were formulated for the first time by members of the Académie.

After the French chemists Louis Nicolas Vauquelin, Louis Jacques Thénard, and Joseph-Louis Gay-Lussac approved the experiments of the young pharmacist Balard, the results were presented at a lecture of the Académie des Sciences and published in Annales de Chimie et Physique.

" Approval from Louis arrived on 27 June: Tallard was to reinforce Marsin and the Elector on the Danube via the Black Forest, with 40 battalions and 50 squadrons ; Villeroi was to pin down the Allies defending the Lines of Stollhofen, or, if the Allies should move all their forces to the Danube, he was to join with Marshal Tallard ; and General de Coignies with 8, 000 men, would protect Alsace.

* Louis de Blois ( 1506 – 66 )

In addition to Bonaparte himself, Louis Alexandre Berthier, Auguste de Marmont, Jean Lannes, Joachim Murat, Louis Desaix, Jean Reynier, Antoine-François Andréossy, Jean-Andoche Junot, Louis-Nicolas Davout and Dumas were all passengers on the cramped Mediterranean crossing.

The Saint-Esprit church was part of a bigger complex built by Louis XI to care for pilgrims to Santiago de Compostela.

* http :// www. chateaudevayres. com / home. html In French and English, with views of the Castle by Louis de Foix, the 16th century French Engineer who deviated the River Adour near Bayonne.

A costume design for Louis XIV as The Rising Sun, from the final entrée of Le Ballet de la Nuit ( 1653 ).

He fought in vain against the setting up of special tribunals, or commissions, to try prisoners charged with political offences, and for his persistence in the case of the brothers Louis and Michel de Marillac he was suspended in 1631, and ordered to appear at Fontainebleau in his own defence.

During that time he was a member of the extraordinary commission that condemned to death the marshal Louis de Marillac and Henri, duc de Montmorency.

Bamford left in 1920 and the company was revitalised with funding from Count Louis Zborowski.

The first significant reference to the influence of Aelian in the 16th century is a letter to Maurice of Nassau, Prince of Orange from his cousin William Louis, Count of Nassau-Dillenburg on December 8, 1594.

The only forces immediately available for Vienna's defence were Prince Louis of Baden's force of 36, 000 stationed in the Lines of Stollhofen to watch Marshal Tallard at Strasbourg ; there was also a weak force of 10, 000 men under Field Marshal Count Limburg Styrum observing Ulm.

In 1388, after Count Louis II of Provence had left to conquer Naples, the Count of Savoy Amadeus VIII took control of Barcelonnette ; however, it returned to Provençal control in 1390, with the d ' Audiffret family as its lords.

On the death of Louis II in 1417 it reverted to Savoy, and, although Count René again retook the area for Provence in 1471, it had returned to Savoyard dominance by the start of the 16th century, by which point the County of Provence had become united with the Kingdom of France due to the death of Count Charles V in 1481.

After being conquered by the Arabs in the early 8th century, it was reconquered in 801 by Charlemagne's son Louis, who made Barcelona the seat of the Carolingian " Hispanic March " ( Marca Hispanica ), a buffer zone ruled by the Count of Barcelona.

Prince Louis was sent to Bordeaux with an escort of 500 knights, as well as Abbot Suger, Theobald II, Count of Champagne and Count Ralph.

Louis became involved in a war with Count Theobald of Champagne by permitting Raoul I, Count of Vermandois and seneschal of France, to repudiate his wife Eléonore of Blois, Theobald's sister, and to marry Petronilla of Aquitaine, Eleanor's sister.

De Rancon however chose to march further, deciding in concert with the Count of Maurienne ( Louis ´ uncle ) that a nearby plateau would make a better camp: such disobedience was reportedly common in the army, due to the lack of command from the King.

On the foreign affairs front, in the Declaration of Pillnitz of August 1791, Holy Roman Emperor Leopold II, Count Charles of Artois, and King Frederick William II of Prussia made Louis XVI's cause their own.

* Marie Eleonore ( 22 March 1607 – 18 February 1675 ), married Louis Philip, Count Palatine of Simmern-Kaiserslautern

He was also styled Louis II, Count of Artois from 1226 to 1237.

When he was 15, Louis ' mother brought an end to the Albigensian Crusade in 1229 after signing an agreement with Count Raymond VII of Toulouse that cleared the latter's father of wrongdoing.

When Pierre returned to France in 1142, Louis refused him permission to enter his Episcopal city, causing Pierre to flee to the court of Theobald II, Count of Champagne.

In early 940, Stephen intervened on behalf of Louis IV of France, who had been trying to bring to heel his rebellious dukes, Hugh the Great and Herbert II, Count of Vermandois, both of whom had appealed for support from the German king Otto I.

By the time the Antipope Christopher ( 903 – 904 ) seized the chair of Saint Peter by force, circumstances had changed at Rome, with the rise of the magister militum Theophylact, Count of Tusculum, who had been stationed at Rome by the retreating emperor Louis the Blind in 902.

With the support of Louis, Henry the Young King attracted many barons to his cause through promises of land and money ; one such baron was Philip, Count of Flanders, who was promised £ 1, 000 and several castles.

** Louis of Enghien, Count of Conversano and Brienne

** Louis I, Count of Blois ( d. 1205 )

* King Louis VI of France agrees to the accession of Thierry of Alsace as Count of Flanders.

* 1268 – The House of Bourbon first rises to prominence with the marriage of Robert, Count of Clermont to King Louis IX of France's daughter, Beatrice of Burgundy, heiress to the lordship of Bourbon.