The Helvetii, also called Helvetians, were a group of Celtic people who lived in what is now Switzerland during the time they interacted with the Roman Republic in the 1st century BC. Julius Caesar wrote that the Helvetians were divided into four groups, or pagi. He named two of these groups, the Verbigeni and the Tigurini, while another writer, Posidonius, mentioned the Tigurini and the Tougeni. The Helvetians are well-known in Caesar’s Commentaries on the Gallic War for trying to move to southwestern Gaul in 58 BC. This failed attempt led to Caesar’s campaign to conquer Gaul.

After 52 BC, the Helvetians were controlled by the Romans. Under the rule of Augustus, ancient Celtic towns like Vindonissa and Basilea were used as military bases. In 68 AD, a Helvetian rebellion was stopped by the Roman general Aulus Caecina Alienus. At first, the Swiss plateau was part of the Roman province of Gallia Belgica, starting in 22 BC. Later, in 83 AD, it became part of Germania Superior. By the 2nd century, most Helvetians had adopted Roman culture.

By the late 3rd century, Roman control in the area weakened, and the Swiss plateau was attacked by the Alemanni. The Alemanni and Burgundians settled in the region during the 5th and 6th centuries, creating areas known as Alemannia and Upper Burgundy. Over time, the Helvetii were absorbed by these new groups, helping to form the early roots of the modern Swiss people.

Name

The earliest known record of the name "Helvetii" appears on a carved message found on a container from Mantua in northern Italy, dating to about 300 BC. The message, written in Etruscan letters, reads "eluveitie," which scholars believe is the Etruscan version of the Celtic term "elu̯eti̯os," meaning "the Helvetian," likely referring to a man of Helvetian heritage living in Mantua.

Historians such as Cicero, Caesar, and Tacitus wrote about the Helvetii in the first century BC and early second century AD. Other ancient writers, including Livy, Pliny, and Ptolemy, used variations of the name, such as "Helvetiorum," "Helveti," and "Elouḗtioi" (Ἐλουήτιοι).

The Gaulish name "Helvetii" is generally thought to mean "(h)elu-ētioi," which may translate to "rich in land." This is believed to come from "elu-" (meaning "numerous," similar to an old Irish word "il") combined with "etu-" (meaning "grassland," similar to an old Irish word "iath"). The presence of the initial "h" in the name suggests it originally began with a "p," a feature from an older language form.

Tribal organisation

Of the four groups within the Helvetii, Caesar mentions only the Verbigeni (Bell. Gall. 1.27) and the Tigurini (1.12). Posidonius also mentions the Tigurini and the Tougeni (Τωυγενοί). Historians in Switzerland, starting with Felix Stähelin in 1927, have debated whether the Tougeni might be the same as the Teutones mentioned by Titus Livius.

According to Caesar, the land the Helvetii left behind included 400 villages and 12 oppida, which were fortified settlements. He recorded a total population of 263,000 people, including men, women, children, and elderly individuals, based on Greek writings captured from the Helvetii. However, most modern scholars believe these numbers are likely too high.

Like many other tribes, the Helvetii did not have kings during their conflict with Rome. Instead, they were led by a class of noblemen called equites. When Orgetorix, a powerful and ambitious leader, planned to become their king, he faced execution if found guilty. Caesar does not name the officials or leaders responsible for prosecuting Orgetorix or capturing him, but he refers to them using the Latin words civitas ("state" or "tribe") and magistratus ("officials").

History

In his book Natural History (around 77 AD), Pliny the Elder wrote a story about the Celtic people who lived in Cisalpine Gaul. In this story, a man named Helico, from the Helvetian tribe, is described as a hero who helped spread culture. Helico had worked in Rome as a craftsman and later returned to his homeland north of the Alps with items like dried figs, grapes, oil, and wine. These items were so valuable that they inspired his people to invade northern Italy.

The Greek historian Posidonius (around 135–50 BC) wrote about the Helvetii, though his writings are only known through other writers. He described the Helvetians of the late 2nd century BC as wealthy in gold but peaceful. He mentioned gold being found in rivers, which some people thought proved the Helvetii lived in the Swiss plateau. However, this idea is no longer accepted, as Posidonius’ writings suggest the Helvetii may have lived in southern Germany instead of Switzerland.

Claudius Ptolemaios, an Alexandrian geographer (around 90–168 AD), wrote about "Helvetic deserted lands" north of the Rhine. Tacitus, a Roman historian, also noted that the Helvetians once lived between the Rhine, Main River, and the Hercynian Forest. Historians believe the Helvetians left this area in the late 2nd century BC, around the time Germanic tribes began moving into Roman lands. The Tigurini and Toygenoi/Toutonoi tribes were part of these movements.

In the area of what is now Zürich, Switzerland, the Celts settled at a place called Lindenhof Oppidium. In 1890, archaeologists found a large lump of melted coins at the Alpenquai site, weighing about 59.2 kilograms (131 pounds). These coins were mixed with charcoal and included both coins from Eastern Gaul and the Zürich region, dating to around 100 BC. Researchers believe the coins were melted to create religious offerings. The site was located about 50 meters (164 feet) from a lake and possibly 1 to 3 meters (3 to 9 feet) underwater. There is also evidence of a Helvetian sanctuary on the island of Grosser Hafner and another at Kleiner Hafner near Zürichsee.

Around 111 BC, Germanic tribes like the Cimbri, Ambrones, and Tigurini arrived in southern Germany. They later joined forces with other tribes and invaded Gaul, including the Roman province of Narbonensis. A Roman army led by L. Cassius Longinus fought them at the Battle of Burdigala in 107 BC. The Tigurini killed Longinus and captured many Roman soldiers. According to Caesar, the Romans forced the captured soldiers to walk under a yoke, a symbol of defeat. This event is only recorded by Caesar, as other sources like Livy’s writings are incomplete.

In 105 BC, the allied tribes defeated another Roman army near Arausio and attacked regions in Spain, Gaul, Noricum, and northern Italy. By 103 BC, the group split into two parts: the Teutones and Ambrones moved west, while the Cimbri and Tigurini crossed the Alps. The Teutones and Ambrones were defeated by Gaius Marius in 102 BC, but the Cimbri and Tigurini wintered in the Padan plain. The next year, Marius defeated the Cimbri at the Battle of Vercellae. The Tigurini, who had followed the Cimbri, returned over the Alps with their loot and joined other Helvetians who had not taken part in the raids.

The Helvetii were the first Gallic tribe Caesar faced in his campaigns. He wrote about their migration in the beginning of Commentarii de Bello Gallico. Because Caesar’s writings were meant to highlight his achievements, some details might not be entirely accurate.

A nobleman named Orgetorix planned a Helvetian migration, aiming to move the entire tribe and gain dominance over Gaul. He conspired with leaders from neighboring tribes, the Sequani and Aedui, to stage coups in their regions. When the Helvetii learned of Orgetorix’s ambitions, they tried to execute him. He avoided punishment by arriving with 10,000 followers but died under unclear circumstances before being captured.

Despite this, the Helvetii continued their migration. In 58 BC, they burned their homes and joined other tribes, including the Raurici, Latobrigi, Tulingi, and Boii, who had attacked Noreia. They aimed to settle in the area of the Santones (Saintonge). The easiest route was through the Rhône Valley, which passed through the Roman province of Narbonensis.

When the Helvetii reached the Allobroges, the northernmost tribe in the province, they found the bridge at Geneva destroyed to block their path. They sent their leaders to negotiate, promising peaceful passage. Caesar delayed them to gather forces and fortify the Rhône’s southern banks. When the Helvetii returned, Caesar refused their offer. They then took a more difficult route through the Sequani territory, crossing the Jura Mountains via a narrow pass near modern Fort l'Écluse. After attacking the Aedui, they crossed the Saône River. Caesar attacked them, defeating the Tigurini and claiming revenge for the Republic and his family.

After the battle, the Romans built a bridge across the river, prompting the Helvetii to send another embassy led by Divico. Caesar linked Divico to the earlier defeat of 107 BC, calling him "leader of the Helvetii in the Cassian campaign." Divico offered a near-surrender, proposing the Helvetii settle in a specific area.

Legacy

After the Gallic Wars, the Roman Empire brought peace to the area along the Rhine where Celts and Germans lived. The Suebi and Marcomanni, who had planned to attack Gaul under Ariovistus, were forced back beyond the Black Forest. There, they joined together to form the future Alemanni. The Romans allowed Germanic tribes like the Ubii, Triboci, Nemetes, and Vangiones to live in the empty lands left along the Rhine. On the right side of the Upper Rhine, where the Helvetians once lived, there are few historical or archaeological records. Ptolemy, a writer in the 2nd century, called this area "Eremus Helvetiorum," meaning the "desolation of the Helvetians," which is now known as modern Baden. This term was later used by Aegidius Tschudi in the 16th century and is still used today. Some historians suggest the Helvetians lived in areas now part of Baden-Württemberg but were forced to move during the Cimbrian War, about two generations before Caesar’s invasion of Gaul.

The Swiss plateau became more like Rome during the 1st to 3rd centuries. Important Roman cities included Iulia Equestris (Nyon), Aventicum (Avenches), Augusta Raurica (Augst), and Vindonissa (Windisch). Evidence shows nearly twenty Roman villages (vici) and hundreds of villas in the region.

As the Romans influenced the area, the Helvetians’ Celtic religion blended with Roman beliefs. Celtic gods were worshiped using Roman names, and Roman gods took on local names, such as Mars Caturix, Mercurius Cissonius, and Jupiter Poeninus. A major religious site with eight chapels or temples was found in Allmendingen near Thun. Deities worshipped there included Mars (possibly Caturix), Rosmerta, and Mithras.

By the 3rd century, the Gaulish language was mostly replaced by Latin, but many Celtic place names remain in Switzerland. Of the ten largest Swiss cities today, at least six have names with Celtic origins, and most major Swiss rivers have names from Celtic or earlier languages.

The peace and stability of the Roman Empire ended during the Crisis of the Third Century. In 260, when the Gallic Empire briefly separated from Rome, Emperor Gallienus moved Roman soldiers away from the Rhine to fight Ingenuus, allowing the Alemanni to attack the Swiss plateau. Cities, villages, and many villas were destroyed or looted by invaders. Many coin caches found between 250 and 280 show how serious the crisis was.

The Helvetii were identified as ancestors of the Swiss in the late 15th to early 16th century. Their name became the Latin word for "Switzer," and the Swiss Confederacy was called "Republica Helvetiorum." The name "Helvetia" for Switzerland’s national symbol and "Confoederatio Helvetica" (CH) for the country’s modern name come from this tradition.

In 2015, the star 51 Pegasi, the first main-sequence star found with an exoplanet, was named "Helvetios" after the Helvetii as part of the IAU’s NameExoWorlds contest.

Celtic oppida in Switzerland

The way La Tène culture burials are spread in Switzerland shows that the Swiss plateau between Lausanne and Winterthur had many people living there. Settlement centers were found in the Aare Valley between Thun and Bern, and between Lake Zurich and the Reuss River. The Valais region and areas near Bellinzona and Lugano also had many people, but these were outside the Helvetian territory.

Most Helvetic oppida were located near major rivers in the Swiss midlands. Not all of these oppida were built at the same time. We do not know the Gaulish names for most of these oppida, except for one or two possible examples. When a pre-Roman name is known, it is written in parentheses. Oppida marked with an asterisk (*) were likely used by neighboring tribes, such as the Raurici and Veragri, rather than the Helvetii.