Oppidum of Manching

Unlike other contemporary Celtic oppida, Manching was not located on a hilltop, but in a riverine plain. The site was placed in a strategic position at the crossing of two ancient trade routes, one running north–south, the other west–east. It was also near the meeting of the rivers Paar and Danube, giving access to navigation of the latter, further increasing the potential for long-distance trade. A distributary of the Danube, northeast of the settlement, had been transformed into a harbour. Manching was probably the most important centre of trade and economy in the late La Tène period. It also had access to rich deposits of iron ore and gold in the immediate vicinity.

The settlement was designed and built according to a systematic plan. Oriented on the cardinal directions, the area had been divided into individual parcels, each with a farmyard-like fence. The interpretation of these rectangular complexes remains controversial. They could represent autonomous farmsteads, reminiscent of Hallstatt period "Manors" (Herrenhöfe). Such an essentially rural type of settlement is not suggested by recent research. It seems more likely that the rectangular parcels represent areas of specialised function, including aspects like agriculture, craft production and cult. Especially the excavations at "Altenfeld" support this conclusion, as they revealed a veritable artisan's quarter.

The central part of the settlement contained a cult complex (see below).

Along the east–west road, linking the known east gate with an assumed west one, there were small huts. Finds suggest that they were stalls for selling trade goods. There was probably a similar road leading northwards from the south gate.

Settlement density within the oppidum was not evenly distributed. Only the central area, right between the east gate and the assumed western one, was placed on relatively dry alluvial soils and most densely settled. Occupation was thinner towards the edges; a 500 m strip inside the wall shows no indication of settlement at all. This area may have been used for cultivation and grazing.

The settlement consisted of single-storeyed post houses with one or more rooms and an area of 40 to 100 m². Some of the buildings were probably half-timbered. The picture is completed by long houses, pit dwellings, storage structures on stilts, storage pits, workshops, and wells. Many ground plans have measurements that can be identified as multiples of half a Celtic foot (15.45 cm). Franz Schubert even found a rod on which bronze rings mark that length, suggesting that it is a measuring rod.

Model of the eastern gate.

Reconstructed section of murus gallicus wall

The first enclosure wall was erected around 150 BC in the murus gallicus technique. It has been calculated that more than 8 tons of nails must have been used in the construction of the 7.2 km of fortification. The exact reasons for its construction are not known, but apart from a potential threat to the settlement, aspects of prestige may also have played an important role. This is suggested especially by the monumental gate complexes. On the inside, the wall was reinforced by an earthen ramp of 9 m width. The second wall was erected around 104 BC as a Pfostenschlitzmauer incorporating the old wall within its body. The Pfostenschlitzmauer technique was also used for a third phase. Before excavation, part of the walls were still visible as a 4 m high earth rampart. Manching appears to be the only known case where murus gallicus (a mostly western Celtic phenomenon) and Pfostenschlitzwall (common further east) occur in a single site.

The Igelsbach stream, approaching the site from the southwest was channeled so as to run into the Paar along the wall. Previously, it had run right through the settlement area. Thus, the southwest part of the walls also possessed an external moat.[2]

The east gate has been especially well studied. Its remains can be visited, as can a reconstruction (further south). It was a Zangentor, i.e. the wall protruded on both sides in front of the actual entrance, thus making it more defensible, as well as more imposing. The gate's superstructure is unknown. This gate was destroyed by fire in 80 BC, its ruins were never cleared, suggesting that the road which it had served was out of use by that time.[3]

There is a variety of evidence to suggest that some agricultural activity took place inside the settlement. Especially the edge of the oppidum may have served as fields. But during its heyday, the oppidum must also have depended on agricultural produce from surrounding areas. The main cultivated food plants were barley and spelt. Proso millet, einkorn, emmer, avena, wheat and rye were also grown. Lentils, vicia faba, poppy, hazelnut and various fruit were also consumed.

An enormous amount of animal bones indicates intense husbandry; perhaps Manching also served as a supra-regional livestock mart.

The position of the site near several streams and rivers always suggested that fish was part of the diet. In recent years, the intensive study of pit fills has proved this to be true. Even traces of the typical mediterranean fish sauce (garum) have been recovered.

A hoard of Celtic coins (Regenbogenschüsselchen) found at Manching. See below: Important finds.

Manching was the site of an extensive iron industry, which mainly produced goods for local use. The iron ore was extracted in the region. Products included a variety of specialised tools, clearly indicating a lively craft tradition. Manching was a centre of production for glass beads and bracelets, most of them of blue glass. There was also a developed production of pottery, jewellery and textiles.

Finds like Baltic amber and Mediterranean wine amphorae show that Manching was part of trade networks spanning all of Europe. Further evidence is provided by luxury tableware (campana), bronze vessels and imported jewellery.

Trade was facilitated by the fact that Manching had its own mint. A local system of coinage, including small silver coins (quinarii) and impure bronze ones served mainly internal trade. External trade relied on coins of gold and (from the early 1st century BC onwards) silver. Like much Celtic coinage, the gold coins minted at Manching are distinctively concave, even cup-shaped, (in German, such coins are traditionally known as Regenbogenschüsselchen or rainbow cups, a term derived from the belief that they are connected with the treasure to be found at the foot of a rainbow). False coinage, e.g. bronze coins with a thin gold covering, has also been found. Fine weighing scales were used to monitor the authenticity and value of coins.

The large variety of keys and locks from the settlement is remarkable. They indicate that people had property worth protecting, and that the cohabitation of so many people in a small area made physical measures necessary to that effect. Different locks appear to have been used for gates, doors, or furniture.

The "Altenfeld" excavation revealed evidence for the extensive reuse (recycling) of scrap metal, the reasons for which remain unknown. As the finds in question are from the final phase of settlement at Manching, they may be connected with the decline that eventually led to the abandonment of the settlement. Perhaps the reuse of raw materials was necessitated by economic problems.[4]

At the centre of the settlement, a temple or shrine was found. Along with a cemetery (see below), this complex appears to represent the earliest activity on the site, suggesting that the settlement developed around them. The complex was in use from the 4th to the 2nd, perhaps even the 1st, century. Deposits of weaponry, horse trapping and parts of cauldrons, a paved plaza and a large amount of bones from human infants and children indicate the cult use of the area. Three further complexes elsewhere in the settlement have been found to contain special building, suggesting a cult.

Copious human bone remains were scattered throughout the settled area. Initially, these were interpreted as proof for a violent end to the oppidum. Nowadays, it is assumed that they are related to cult behaviour (ancestor cult). A detailed interpretation has not been produced so far. There is definite evidence for secondary burial. Parts of partially decomposed bodies, especially long bones were removed and kept (perhaps as relics?) or deposited separately, e.g. as nests of skulls near the gates.

It used to be commonly assumed that the Roman occupation of Southern Germany entailed the violent destruction of the Manching settlement. However, a conquest or complete destruction of the site is considered unlikely today, although Manching may have been involved in some military conflict connected to the migrations of the Cimbri and Teutoni, c. 120 BC. The reason for the final demise of the oppidum is now seen in the collapse of Celtic economic systems caused by Gaius Julius Caesar's conquest of Gaul. Manching apparently underwent a long-term loss of population, leading to the abandonment of much of the settled area and the dilapidation of its walls, which could not be maintained any more. By the time of the Roman arrival around 15 BC, ruins of the imposing walls were all that remained of a city that had flourished a century earlier.