As early as the 12th century, the distinctive character of the city's districts was emerging. The Ile de la Cité, on which the Cathedral of Notre Dame de Paris was built in 1163, was the centre of government and religious life; the Left Bank was the centre of learning, focusing on the various Church-run schools established there; and the Right Bank was the centre of commerce and finance. A league of merchants, the so-called Hanse Parisienne, was established and quickly became a powerful force in the city's affairs.
In 1900 Paris hosted the 1900 Summer Olympics. In late August 1944 after the battle of Normandy, Paris was liberated when the German general Dietrich von Choltitz surrendered after skirmishes to the French 2nd Armoured Division commanded by Philippe de Hauteclocque backed by the Allies.
With the recapture of the city, the Valois monarchs and French nobility sought to impose their authority on the city through the construction of various grandiose ecclesiastical and secular monuments, including churches and mansions. Over the following century the city's population more than tripled. Francois I had probably the greatest impact of any Valois monarch, transforming the Louvre and establishing a glittering court including such notables as Leonardo da Vinci and Benvenuto Cellini.
The Merovingian kings died out in 751, to be replaced by the Carolingians. Pépin was proclaimed king of the Franks in 751, to be succeeded by Charlemagne, who moved the capital of his Holy Roman Empire from Paris to Aachen.
The city emerged into an energetic but restless interwar period, enlivened by the arrival of glamorous émigrés such as Josephine Baker. It was a troubled political period, however, especially when the Great Depression hit Paris.
Tensions were high, and led to the largest abuse in the city's postwar history, when the Paris police, told wrong news about policemen having been murdered by independentists, massacred an estimated 300 pro-independence demonstrators on 17 August 1961; remarkably, the event, though known in some circles, was largely ignored until the 1990s. (See Paris massacre of 1961)
Louis and those who supported an agreement with the monarchy were accused by the radical Jacobins of being the stooges of foreign powers, and on 10 August 1792 a mob demanded that the National Assembly depose the king. When the demand was refused, the mob attacked the Tuilleries and seized the royal family. Power now passed to the radical Commune de Paris, led by Georges Danton, Marat and Robespierre.
An invading Prussian army heading for Paris was defeated shortly afterwards, clearing the way for the bloodiest phase of the Revolution. A guillotine was erected in what is now the Place de la Concorde and was used on 21 January 1793 to execute Louis XVI. Marie Antoinette followed in October 1793.
In June 1944, Allied forces (including the Free French under General Charles de Gaulle) invaded Normandy. Two months later they broke through German lines and advanced rapidly across France. An uprising broke out in Paris on 19 August, led by the Resistance and the city's Police.
Matters came to a head on 23 August 1572 with the St Bartholomew's Day Massacre, when Catholic mobs killed an estimated 3,000 Protestants on the instructions of King Charles VIII. His successor, King Henry III, attempted to find a peaceful solution but the city's population turned against him and forced him to flee in May 1588. The following year, he was assassinated by a fanatical Dominican monk, bringing the Valois line to a premature end.
Paris held out for four months, by which time starvation had taken hold and the population had been reduced to eating rats. The city finally surrendered on 28 January 1871 with punitive terms being inflicted on the defeated French. They were, in fact, unacceptably punitive in the eyes of many Parisians, who saw the peace treaty signed by the government of Adolphe Thiers as a betrayal.
Several schools on the Left Bank were grouped together into the Sorbonne, which counts Albertus Magnus and St. Thomas Aquinas among its early scholars. In the Middle Ages Paris prospered as a trading and intellectual nucleus, interrupted temporarily when the Black Death struck in the 14th century. Under the reign of King Louis XIV, the Sun King, from 1643 to 1715, the royal residence was moved from Paris to nearby Versailles.
The new rulers organised themselves into a five-man Directoire but had only a shaky grip on power. In 1795 they were saved from a royalist revolt by a young army officer named Napoleon Bonaparte, who dispersed a hostile Parisian mob by the simple expedient of firing into it with cannons at point-blank range.
The city was saved, however, by a desperate French effort to reinforce their lines and by a German failure to press home the attack. In the most famous incident of the "miracle on the Marne", as it became known, thousands of Parisian taxis were commandeered to carry soldiers to the front lines. The Germans were pushed back to the Oise some 75 miles away from the city.
The Bois de Boulogne and the Bois de Vincennes were both transformed into large public parks. Although Haussmann was forced to resign in 1869 after financial irregularities, his scheme is largely responsible for the present-day look and layout of Paris.