Lutetia was renamed Paris in 212, after the local tribe, but the rest of the 3rd and 4th century was wracked by war and civil unrest. The city came under attack from barbarian invaders, prompting the construction of a defensive city wall. In 357 the Emperor Constantine's nephew Julian arrived in Paris to become the city's new governor. Although his uncle was famously the emperor who declared Christianity the official religion of the Empire, Julian "the Apostate" strove to roll back its advance. He became emperor in 361 but died in battle only two years later.
Civil war broke out in France after the assassination of Louis of Valois, Duke of Orléans by the Burgundian John the Fearless. In the ensuing chaos, the English captured Paris in 1420. In 1422, Henry V of England died at the Chateau de Vincennes, just outside the city.
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.
The inhabitants of Paris are known as Parisians in English, as Parisiens in French, and as Parigots in French slang.
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.
In the aftermath of the revolt, Charles V of France took steps to guard against a recurrence; a new city wall was constructed to guard against exterior enemies while the grim fortress of the Bastille was built to control the city's restless population. Another revolt, this time over excessive taxation, broke out in 1382 under Charles VI of France but was quickly and violently suppressed. The city was subsequently punished by having its earlier privileges withdrawn.
Under Louis XVI, Paris reached new heights of prestige as a centre of the arts, sciences and philosophy. It was in Paris that the Montgolfier brothers made their historic balloon ascents in 1783. However, the French state was by now virtually bankrupt, its finances drained by the Seven Years' War and the French intervention in the American War of Independence.
Henri III had nominated Henri of Navarre, a Protestant, as his heir. The new king, Henri IV, converted to Catholicism in 1594 with the declaration that "Paris is well worth a mass," thus convincing the Parisians to accept him as their king. He undertook a number of major public works in the city but faced constant danger from religious fanatics on both sides, particularly after granting religious tolerance to Protestants under the Edict of Nantes. After surviving at least 23 assassination attempts, he fell victim to a Catholic fanatic on 14 May 1610.
During the latter half of the 18th century, Paris became the intellectual and cultural capital of the Western world. It became a centre of the Enlightenment with its salons becoming the centre of the new thinking of the "Age of Reason." This was positively encouraged by the state, with Louis' mistress Madame de Pompadour supporting the city's intellectuals and prompting the king to construct striking new monuments.
The area of modern Paris has been inhabited since at least the fourth millennium BC, although little is known about these early inhabitants. The first known permanent settlement on the site was founded about 250 BC by a Celtic tribe called the Parisii, who established a fishing village on the Seine island that was later to become the Ile de la Cité. This was known as Lutetia, a name first recorded by Julius Caesar in his Gallic Wars.
Under Roman rule, the town was thoroughly Romanised and grew considerably. It was, however, not the capital of its province, Lugdunensis Senona - that role was played by Agedincum (modern Sens, Yonne). It was Christianised in the 3rd century when St Denis became the city's first bishop. The process was not entirely peaceful - in about 250 St Denis and two companions were arrested and decapitated on the hill of Mons Mercurius, thereafter known as Mons Martis (Martyrs' Hill, now Montmartre).
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.
As running battles were fought in the streets of Paris, Hitler ordered the city's commandant, von Choltitz, to destroy the capital. Von Choltitz, however, stalled. When General Leclerc's 2nd Armoured Division arrived on the outskirts of the city, von Choltitz ordered his forces to retreat, leaving the city open and largely intact with only stragglers from the garrison and dead-end resisters from the Vichy regime left to offer resistance. De Gaulle and Leclerc entered the city to a jubilant reception, establishing a temporary military government that lasted until 1946.