After the restoration of civilian rule and the proclamation of the Fourth Republic in 1946, Paris made a rapid recovery from the war, aided by its lack of much physical damage. Like the rest of France, however, it was caught up in the bloody but unsuccessful wars against nationalist guerrillas in Indochina and Algeria in the 1950s and 1960s. During the Algerian war of independence, independentists detonated bombs in Paris.
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.
When Hitler invaded France on 14 May 1940 it took the German army only a month to reach Paris, invading through neutral Belgium around the Maginot Line, where the French defenses were massed. Paris fell with virtually no resistance on 14 June. Much of the city's population fled, with 1.6 million of its 3.5 million people leaving between May and June 1940.
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.
Paris is densely covered by a metro system, the Métro, as well as by a large number of bus lines. This interconnects with a high-speed regional network, the RER, and also the train network: commuter lines, national train lines, and the TGV (or derivatives like Thalys or Eurostar for specific destinations). There are two tangential tramway lines in the suburbs: Line T1 runs from Saint-Denis to Noisy-le-Sec, line T2 runs from La Défense to Issy. A third line along the southern orbital road is currently under construction.
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)
France's political divisions were a major factor in its ill-preparedness for the outbreak of the Second World War on 3 September 1939. Some of the Catholic Right were openly hostile to parliamentary democracy, Socialism and Communism, and welcomed the possibility of a fascist regime, even imposed by foreign forces.
Paris' party continued virtually until the eve of the outbreak of the First World War on 2 August 1914. Like other French cities, Paris initially welcomed the war as an opportunity to gain revenge for the defeat of 1870. Within a month, however, the city was full of refugees and the Germans were just 15 miles from the city. The government was evacuated to Bordeaux in the expectation that Paris would again fall to German forces.
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.
By this time, Paris was a typically crowded early medieval city with timber buildings alongside surviving Roman remains. According to the chronicler Geoffrey of Tours, it suffered a disastrous fire in 585. The city grew beyond the boundaries of the Ile, with suburbs being established on both banks of the river.
The persecution of Jews in Paris began within 48 hours of the city's fall, when they were required to register with police. On 14 May 1941 the Vichy police began deporting Parisian Jews, rounding them up at the Velodrome d'Hiver.