The research done by Bulliot and Déchelette at the end of the 19th century and at the beginning of the 20th century recreated an organization of the site into neighborhoods, with construction mostly following a central road from the Gate of Rebout to the Great Gates. This organization differs from that of oppida like Manching, where there is a regular urban framework; this is explained by the relief of the terrain, as the battlements encircle three summits with some relatively steep slopes. Since 1984, the excavations have seemed to confirm Déchelette's and Bulliot's hypotheses in broad terms, while nevertheless contributing certain nuances.
Battlements Bibracte was protected by strong
Murus Gallicus style battlements, which excavations have been able to reconstruct. The city had a progression of two different surrounding walls and at least five restorations of the inner surrounding wall, revealed, among other things, by the study of the Rebout gate. The outer wall encircles an area of 200 hectares and was the subject of research beginning in 1992 for initial probing. This archeological research revealed that the battlement originally had a height between four and five meters (13 and 16 feet) without its yet-unknown top (e.g., palisades or towers) and an identical depth, and was preceded by a ditch between deep and between wide. A study was conducted between 1995 and 2002 with many probes along with those by the
University of Vienna. The researchers were able to ascertain that this battlement was a Murus Gallicus that had been dismantled in order to construct the inner wall. The dating, however, remains imprecise, and places this event during the 2nd century. These excavations revealed five levels of different restorations, including a
palisade from the
Neolithic Era (dated with
carbon-14). The latter has been the object of a reconstruction since 1996 which currently marks the entry into the old
oppidum. At the present time, research has not been able to detect a trace of a method for locking the gate or a defensive device for it. Some hypotheses have advanced the idea of a double gate surmounted by a wooden guard tower like that of the Manching oppidum, but nothing has yet confirmed this. The recent research on the battlements, since 2005, has concentrated on a line of fortification downhill from the Gate of Rebout. Dating seems to indicate that this construction took place after that of the gate and therefore constituted an advance fortification. At the same time, some aristocratic tombs have been discovered between the two lines of battlements.
Public buildings Excavations conducted between 2012 and 2017 uncovered the remains of a large monumental public building dating to the La Tène period, c. 70 BC. In the first phase of construction (c. 70 BC) a terrace was built, surrounded by a
murus gallicus stone wall with a large entrance on the east side. On the terrace a 44-metre-long square building was constructed out of wood, with galleries surrounding a central courtyard. Around 30 BC a monumental building was erected in the central space and the galleries were replaced with a palisade. In c. 15 BC the previous building was levelled and a vast platform was built which was surrounded by stone walls. In the centre the space was possibly occupied by a new central building. Next to this another platform was built, also surrounded by a stone wall, with an internal gallery built from wood. These constructions have been compared to other known public buildings and temples from the La Tène period, though the precise purpose of the buildings at Bibracte is yet to be determined. According to Hantrais et al. (2020) "The characteristics of this monumental construction indicate that it was certainly a public building with original architectural features and techniques. Yet, although this monumental building is very well documented archaeologically, its exact function remains enigmatic."
Artisans' neighborhoods of Côme Chaudron and Champlain Excavations in the neighborhoods known as the Côme Cauldron and the Champlain, near the Rebout Gate, have revealed a neighborhood dedicated to metalwork and to artisans' lodging. This metalworking seems to have been very specialized, incorporating blacksmiths, bronzeworkers, and enamellers, whose workshops had already been restored by Bulliot, and probably also involved goldsmiths and minters. Excavations on the site of Beuvray, in the region of the Champlain, and on the surrounding massifs revealed the existence of mines for the extraction of metals, including gold, iron, and tin ore. This research will continue and will attempt to restore the workshops for the smelting of the metals extracted outside the oppidum. In fact, given the specialization of the workshops in Bibracte, it seems that the metals arrived in bars which were therefore cast outside the oppidum. Another artisanal neighborhood has been found in the region of one of the summits of the site, at the Rock of the
Wyvern, an area which had been little investigated at the time of Bulliot and Déchelette's research. This neighborhood will be the object of future excavations which will attempt to determine the function of the neighborhood.
Horse Park At the center of Mont Beuvray, the plateau known as the Horse Park holds several Roman-style stone houses which were excavated in the 19th century. The houses include, in particular, the residence PC1 (so named by Bulliot), which is a veritable gold mine for the researchers. In fact, it developed from a wood construction (of Roman inspiration) into a
domus with an
atrium containing an
impluvium,
porticos, and
thermae heated by
hypocaust, along with a system of sewers. In its final stage, the residence measured 55 by 67 meters, covering an area of around 3500 square meters, about four times the size of the domus found on the site of
Pompeii. It is estimated that there were about fifteen domuum in this area, such as PC2, a smaller residence that faces PC1 on the other side of the central road. There are also homes of the
villa rustica type (the Italian rural residences) like PC33. However, it is still not known whether this was a residential neighborhood reserved for only the elite, since excavations have also revealed the presence of forges near the domus. 3) The basin has a length/breadth/height ratio of 3/1/0.5, equivalent to 36/12/6 units with a value of 30.4cm. A similar unit of measurement has been identified at the
oppidum of Manching in Germany and described as a 'Celtic foot'. The boat-like shape of the basin might be related to the mythology of the
solar boat, which is also associated with the Divine Twins. Almagro-Gorbea (2017) suggests that the Bibracte basin "seems to be correlated to the druid
Diviciacus, an expert in the philosophy of nature", in reference to
Cicero's statement that “there are indeed Druids in Gaul — for I knew one of them myself, Divitiacus, the Aeduan ... He claimed to have that knowledge of nature which the Greeks call '''physiologia'".'' Various classical authors referred to the druids as
philosophers, who possessed a knowledge of
astronomy and adhered to
Pythagorean beliefs and practices.
Hippolytus of Rome stated that the druids "investigated to the very highest point the Pythagorean philosophy" and foretold certain events "from calculations and numbers by the Pythagorean art". Some modern authors have suggested that Bibracte was the site of a druidic school, as described by
Julius Caesar in the
Gallic War: The later Aeduan capital of was the location of the
Menian schools, which were dedicated to the study of
liberal arts and law. The schools are mentioned by
Tacitus in his account of the
Revolt of Sacrovir:
Places of worship The oppidum of Bibracte has about ten springs and five fountains dating from the Gallic or Gallo-Roman periods. The Saint Pierre Fountain was a place of worship and pilgrimage, in which coins and
votive offerings were found. Under the current chapel from the 19th century, the 1988 excavations discovered a Gallo-Roman temple.
Necropolis Located below the present-day museum parking lot, the necropolis underwent archaeological excavations, with the aim of saving it, when the museum was created and the
route départementale was diverted. Over a surface area of 1.5 hectares, 70 funeral enclosures, used following incineration, were found, each having an eastern entry. The crematorium was found further south. Other funerary urns were discovered at the foot of the Rebout Gate, possibly the remains of a local aristocratic family. More cemeteries are presumably situated on the former site access paths, as was often the case at the time, but have not yet been excavated.
Basilica In the area of the Convent Pasture the excavations revealed, under a large
domus of the Augustan era, the presence of an exceptional public monument, which was at the time unique in Gaul: a Roman
basilica with three naves and an internal
peristyle with a peripheral
ambulatory, displaying four rows of eight columns or eight
pilasters. It was connected on the east with a small square, 22 meters on a side, bordered to the north and south with
porticos which were extensions of the walls of the annexes of the basilica. On the west it was connected to the main road of Bibracte with another square, 17 meters on the side. Some architectural elements have been found that attest the presence of limestone columns with
Attic bases and
Doric and
Corinthian capitals. These elements formed a monumental urban project of the greatest importance. These public buildings date to the period between 50 and 40 BCE and between 35 and 25 BCE. At this date, the basilica and the square were carefully leveled and replaced by a large private residence, doubtless in connection with the move of the Aedui capital to Autun. The basilica of Bibracte confirms the exceptional importance of the site and revealed that the Romanization of the Aedui was considerably more rapid than previously believed. The basilica of Bibracte is currently the oldest representation of Roman monumental stone architecture in non-Mediterranean Europe. == A window to the Celtic world ==