A Celtic Hillfort in Luxembourg

By: Ralph M. Rowlett

Originally Published in 1988

View PDF

In southwestern Luxembourg, near the border where Luxem­bourg, Belgium, and France come together, the site called Titel­berg sits astride a hill that dominates the surrounding countryside (Fig. 1). Earthen ramparts standing in some places to a height of 9 m representone phase of the occupation—a late Iron Age hillfort built by Celts around 200 B.C. Stratified above the Iron Age remains is a Gallo-Roman set­tlement that continued to be oc­cupied until ca. A.D. 400. This con­tinuity of occupation during a period when major political changes took place in the region, most notably Caesar’s conquest of the Gauls be­tween 58 and 51 B.C., has made the Titelberg a well-known and sig­nificant site.

Also unusual is its good state of preservation: unlike almost all other similar Iron Age sites, Titelberg es­caped the considerable damage in­flicted by extensive, usually poorly documented excavations carried out in the mid-19th century, when archaeology was still embryonic. While the absence of earlier excavation preserved the Titelberg for in­vestigation by 20th century methods, it also meant that there was very little evidence as to the sequence of occupation on the site, and when it was first occupied. There were, however, collections of finds made by local Luxembourgers, who had well-established customs of surface prospecting on the Titel­berg. These artifacts were used by Dr. Gerald Thill, the Curator-Director of the Luxembourg State Museums, to suggest that the site had been occupied in the Neolithic and Iron Age periods, as well as in the times of the Roman Empire (ThilI 1966).

Having begun a modern campaign of continuous archaeological re­search on the Titelberg during the late 1950s, Thill then invited the University of Missouri-Columbia to help investigate the early levels of the site. As a result, multi-discipli­nary teams of archaeologists specializing in prehistoric periods (led by Ralph M. and Elsebet Rowlett) and Provincial Roman remains (led by Homer L. Thomas) worked on the Titelberg from 1972 to 1982.


The term oppidum, transmitted to us by Latin writers, was used to describe fairly large urban or proto­urban settlements of the Gauls and other Celts, who also inhabited vil­lages and farmsteads. Almost all of the oppida were fortified with one or more ramparts of stone or stone and earth, often reinforced with a timber framework, and usually topped with a wooden palisade.

Most oppida were sited on the top of hills, and so are referred to as “hillforts”; however, many hillforts show little evidence of permanent or continuous habitation, so not all hillforts are oppida. Hillforts are especially common in Europe toward the end of the Iron Age, when nearly every Celtic tribe had one or more within its territory.

At the time of the Roman conquest or within a few decades thereafter, the inhabitants of most Celtic oppida were moved out of their homes. While not unique in having a con­tinuing occupation throughout this period, the Titelberg remains highly unusual in that its population and its manufacturing activities seem to have increased after the estab­lishment of Roman rule. At present, the best explanation for this phenomenon seems to be a Roman demand for iron. Numerous rich iron ore deposits lie within the Titelberg itself, and the excavations of the Luxembourg State Museum have revealed the emplacements for an iron smithy and iron bloomery dating to the Gallo-Roman period.

In addition to metal working, other industries have also been docu­mented archaeologically on the Titelberg. Excavations have un­covered a glass factory and a small potter’s workshop. The potter’s workshop is of special interest. It contained a potter’s wheel, and a kiln for firing pottery that looks like a miniature version of the furnaces (hypocausts) used for heating Roman houses (Fig. 6). Its primary product was an ugly, poorly fired, shell-tempered ware that was widely distributed within the region and was apparently a specialty product of the Titelberg (Fig. 7; Metzler and Weiler 1977).

These pots must have been fairly expensive, since the shells ground to make the temper came from the sea and had to be imported. The reason for the popularity of such vessels—despite their appearance probably lay in their durability. Shell tempering serves to reduce cracking and breakage when vessels are subjected to thermal shock, as they would be if used in cooking. A study of the location of shell-tempered pots within the Titelberg has shown that they were found primarily in as­sociation with fireplaces, confirming the hypothesis that they were used as cooking vessels.

The Missouri Excavations

The landform on which the Titel­berg was built is properly called a “cuesta”-a hill that drops off sharply on one side and slopes gradually on the other. The most visible remains on the hill are those of a typical late Iron Age settlement of the type that archaeologists call a “hillfort,” and contemporary Roman writers called an oppidum (see box). Built in Mid­dle La Tene times, ca. 200 B.C., the ramparts of this fort enclose an area of 125 acres or 50 hectares. There are two clearly defined entrance ways at each end of the long axis of the ham-shaped site, with the prin­cipal gateway at the southeast end (Fig. 2).

The first location chosen for ex­cavation by the Missouri team was a low area lying amid Gallo-Roman houses that had been cleared by the Luxembourg State Museum. The Museum’s archaeologists had also found traces of three wood and thatch houses of the late La Tene Iron Age, dating to about the time of the Roman conquest in 57 B.C. (Metzler and Weiller 1977:28-33). Although the low area did have several strata laid down in later Roman times, almost all of the struc­tures that were found by the American excavations date from the time of the early Roman Empire under the Emperor Augustus or even earlier—extending back through the Iron Age into the Late Neolithic period (Fig. 3).

The focus of this paper is on the strata laid down in the early Roman and Iron Age periods, distinguished from one another on the basis of color as well as composition. Seven­teen floor levels were found, repre­senting at least seven different su­perimposed buildings that covered a period of nearly four centuries, ca. 300 B.C. to A.D. 70 (Fig. 5, Table 1).

The Buildings and Their Contents

On the paving gravels of a street within the Gallo-Roman settlement we found a glass intaglio bezel for a ring that depicts three astrological signs—a crab (Cancer), the moon, and a star (Fig. 4). While the exact prognostication for someone born under these signs would depend upon the precise relationships of the celestial bodies at the moment of birth, the 4th century Roman astrologer Maternus gives us a general prediction. Such a person would travel far, make a lot of money, and in the end lose every­thing. We cannot know if the ring wearer had actually traveled up to the Titelberg from Italy, but he was certainly close to a significant source of money when the ring was lost: the street ran in front of the Titelberg mint!

Most of the structures excavated by the University of Missouri team had been used as mints or mint foundries, for the production of gold, silver, and bronze coins, and of other bronze objects similar to coins in form. The evidence for bronze artifact and coin manufacture is abundant. Found in and around the buildings were ceramic coin molds and unstruck coins, as well as weights, counter disks, a few pos­sible coin dies, large quantities of scrap bronze, smelting ovens, chisels; hammers, and other iron tools.

More than 1000 coin mold frag­ments were recovered and their locations plotted in three dimen­sions. The molds take the form of flat bricks. Although their fragmentary condition makes it difficult to deter­mine their exact size, they were about 2 cm thick and 18 cm per side. Cylindrical depressions, made by the intrusion of dowels of ap­propriate size, provided the forms for casting the coin blanks or “flans” (Fig. 8). Domestic activities were also carried out within the mint-foundry buildings, since some rooms contained the bones of food animals, egg shells, burnt grains and vegetables, spindle whorls, pot-decorating tools, and other household implements.

The Foundation House

The last and most recent mint foundry building, the Foundation House (Figs. 9, 10), was con­structed about the time of Christ and was razed about the time of the Emperor Vespasian (A.D. 69-79). These dates are based on coins and sherds of red terra sigillata pottery found within a 39-cm-thick floor level, which had built up rapidly as a result of the practice of laying fern frond carpets on the floor. Such car­pets eventually decayed, leaving masses of spores in the ar­chaeological soil.

The Foundation House consisted of two rooms with a central corridor. Part of the building had been destroyed, dug away in late Roman times, but if one assumes a sym­metrical plan, the building was sur­rounded by a colonnade. These columns must have been made of woo initially, since they sat in post holes. Early in the 1st century A.D. they were replaced with proper stone columns, the broken drums of which have been recovered. The South Room contained a majority of coin molds, a work bench constructed of broken roofing tiles, and a bronze head that may represent a household deity (Fig. 11). The North Room was also for industrial activities. A truncated “cone” of stacked rocks bears chisel marks on the top stone, indicating that it was used as a kind of anvil to seperate coins cast in a series. Discards from the casting operation show that small coin-sized objects shaped like wheels (rouelles) were among the last products of this workshop (Fig. 12).

The evidence from the mints and the Orange-Brown Floors is sig­nificant within the sphere of economic history, since it indicates that the Gallic inhabitants of this op­pidum were striking their own coinage before the period of Roman domination, and well before com­mercial contacts with the Roman world intensified so markedly in the latter part of the 1st century B.C. Moreover, the evidence for gold, sil­ver, and bronze coins-that is, for coins of high as well as low denominations—indicates that the native economy was based on money rather than baiter at this time.

Beneath the Orange-Brown Clay Floors were 4 floors composed of mud heavily mixed with ash, a Celtic formula for earth-floor houses that survived in Gaul until the 20th cen­tury (Helias 1975:49). These ashy floors hardly leave a clear outline due to numerous disruptions from the 13 floors superimposed above. They appear, however, to have been rectangular with rounded corners in plan, and therefore dif­ferent from the more rectilinear floor above.The fireplaces associated with these floors were pits nearly 50 cm deep, a characteristic feature of ear­lier La Tene times in northeastern Gaul. A fibula and a twisted baldric sword chain found in these levels (Fig. 16) confirm that these floors were laid down in Middle La Tene times, around 200 B.C. or earlier. At present, the Ashy Floor Buildings are the oldest known Iron Age struc­tures on the Titelberg. One other aspect of these buildings deserves attention: concentrations of horse bones were found at the top of each fireplace, as if there had been a last ritual meal eaten immediately prior to the renovation of the floor.

A Special Location?

The repeated repair and rebuilding of the mint foundry buildings was apparently intended to maintain them in good condition. This stress on appearance can be interpreted as a reflection of the importance of these structures and their contents within the community. A further in­dication that this locality within the Titelberg was a special one comes from artifacts found in close proximity to the mint buildings. Two remarkable silver fibulae were found on the site surface just to the east of the mint foundries by Luxembourger amateur archaeologists. One of these brooches shows a horseman, and the other portrays a human head with two dolphins (Fig. 17). Based on stylistic criteria, the fibulae date to the late La Tene Iron Age, and were therefore contemporary with several of the mint buildings. In each case, the image portrayed closely matches in form a figure on the Gundestrup cauldron, the famous ritual vessel found in a bog in Denmark (Rowlett and Rowlett 1985).

The significance of the mint foundry locale is also reflected in the fact that no other structures were built here after the demolition of the Foundation House in the mid-1st century A.D. The space was left open despite the fact that it lay close to the center of the oppidum, near an area with intense building activity in the Gallo-Roman period. The only exception to this lack of construction activities is a feature (the “Northern Smelter”) that cuts into the North Room of the Foundation House. This feature was used as a furnace wherein all kinds of bronze scrap were melted down for bullion. Much of this scrap consisted of obsoles­cent and out-of-circulation bronze coins. In places where some of the bronze coins escaped the notice of the bullion makers, the coins lay draped over the stones of the furnace as if they had been painted there by Salvador Dali. Indeed, of the 218 recognizable coins found in this furnace, 192 (88 per cent) had been warped and distorted by the heat of an oak charcoal fire (Thomas and Rowlett 1979).

Based on the presence of coins dated to A.D. 335, and of pottery characteristic of the later 4th century (roller-stamped terra sigillata, Mayener ware pitchers, and frag­ments of Frankish claw beakers), this feature can be dated to around A.D. 400, or perhaps a little later. Together with some 4th century houses, it is one of the latest struc­tures on the Titelberg.

Whoever constructed the furnace, whether Frankish newcomers or resident Gallo-Romans, they seem to have essentially observed the old prohibitions about building in this area. It seems as if it was considered permissible to build over the old mint foundry locale—out of use for some 300 years—if the new structure was also related to coins. Indeed, the memory of the mint on the Titelberg was kept alive in the folklore of the neighboring villages of Rollingen, Rodange, and Petange into the 19th century. Well before archaeologists had found the mints or coin molds, folktales told of gnomes who had made coins atop the Titelberg by throwing bars of silver into bonfires (Collette In press). The spot indi­cated for these magical manufac­tures was near where the mint foundries were actually uncovered.

We suspect that one reason why the place was so important is that the mint was under the protection of the chief of the Titelberg. Traces of house floors were found just north of the mint foundries by the Luxem­bourg State Museum, but so far they remain unexcavated, a challenge for the future.


Cite This Article

Rowlett, Ralph M.. "Titelberg." Expedition Magazine 30, no. 2 (July, 1988): -. Accessed March 03, 2024. https://www.penn.museum/sites/expedition/titelberg/

This digitized article is presented here as a historical reference and may not reflect the current views of the Penn Museum.

Report problems and issues to digitalmedia@pennmuseum.org.