The city of Bern or Berne (; ; ; ; Bernese German: Bärn ) is the Bundesstadt (federal city, de facto capital) of Switzerland, and, with (as of ) a population of , the fifth most populous city in Switzerland. The Bern agglomeration, which includes 43 municipalities, has a population of 353,300. The metropolitan area had a population of 660,000 in 2000. Bern is also the capital of the Canton of Bern, the second most populous of Switzerland's cantons.
No archaeological evidence that indicates a settlement on the site of today′s city centre prior to the 12th century has been found so far. In antiquity, a Celtic oppidum stood on the “Engehalbinsel” north of Bern, fortified since the 2nd century BC (late La Tène period), thought to be one of the twelve oppida of the Helvetii mentioned by Caesar. During the Roman era, there was a Gallo-roman vicus on the same site. The Bern zinc tablet has the name Brenodor "dwelling of Breno". In the Early Middle Ages, there was a settlement in Bümpliz, now a city district of Bern, some from the medieval city.
The medieval city is a foundation of the Zähringer ruling family, which rose to power in Upper Burgundy in the 12th century. According to 14th century historiography (Cronica de Berno, 1309), Bern was founded in 1191 by Berthold V, Duke of Zähringen.
Old Swiss Confederacy
In 1353 Bern joined the Swiss Confederacy, becoming one of the "eight cantons" of the formative period of 1353 to 1481. Bern invaded and conquered Aargau in 1415 and Vaud in 1536, as well as other smaller territories, thereby becoming the largest city-state north of the Alps, by the 18th century comprising most of what is today the canton of Bern and the canton of Vaud.
The city grew out towards the west of the boundaries of the peninsula formed by the River Aare. Initially, the Zytglogge tower marked the western boundary of the city from 1191 until 1256, when the Käfigturm took over this role until 1345, which, in turn, was then succeeded by the Christoffelturm (located close to today's train station) until 1622. During the time of the Thirty Years' War two new fortifications, the so-called big and small Schanze (entrenchment), were built to protect the whole area of the peninsula.
After a major blaze in 1405, the original wooden buildings were gradually replaced by half-timbered houses and later the sandstone buildings that came to be characteristic for the Old Town. Despite the waves of pestilence that hit Europe in the 14th century, the city continued to grow mainly due to immigration from the surrounding countryside.
Bern was occupied by French troops in 1798 during the French Revolutionary Wars, when it was stripped of parts of its territories. It regained the Bernese Oberland in 1802, and following the Congress of Vienna of 1814 newly acquired the Bernese Jura, once again becoming the largest canton of the confederacy as it stood during the Restoration, and further until the secession of the canton of Jura in 1979. In 1848 Bern was made the Federal City (seat of the Federal Assembly) of the new Swiss federal state.
The city's population rose from about 5,000 in the 15th century to about 12,000 by 1800 and to above 60,000 by 1900, passing the 100,000 mark during the 1920s. Population peaked during the 1960s at 165,000, and has since decreased slightly, to below 130,000 by 2000. As of 31 December 2009, the resident population was at 130,289 of which 101,627 were Swiss citizens and 28,662 (22%) resident foreigners. Another estimated 350,000 people live in the immediate urban agglomeration.