Every year in Germany, hundreds of ancient objects are discovered by individuals equipped with metal detectors. While some act completely legally, others dig without authorization, at the risk of irreparably damaging archaeological sites. This is precisely what happened in Borsum, Lower Saxony, where an amateur detectorist unearthed a Roman treasure in 2017 without informing the authorities.
Kept in secret for eight years, this deposit of more than 450 silver coins, accompanied by a ring and a gold coin, is today one of the most important ever found in the region. Its rediscovery raises crucial questions about heritage management, historical cohabitation between Romans and Germans, but also about the responsibilities of amateurs in the face of collective history. This case illustrates the concrete issues linked to the protection of archaeological remains.
An illegal, but major discovery in Lower Saxony
In 2017, a 23-year-old man using a metal detector discovered a large ancient deposit near Borsum in the district of Hildesheim. Without a permit, without authorization, and in violation of German heritage legislation, he sets out to recover what he has just found on his own. These are metallic objects buried in the ground, the scientific significance of which he poorly measures. For eight years, this treasure remained hidden. It will be necessary to wait until April 2025 for him to finally declare it to the police and the monument conservation authorities.
However, the law in Lower Saxony is clear. Any prospecting using a metal detector must be supervised by official authorization. The objective is twofold: to avoid the destruction of the archaeological context and to ensure the conservation of the artifacts. The unsupervised excavation carried out at Borsum has, according to experts, compromised valuable data. The soil, once reworked, loses the essential clues to the interpretation of the deposit.
Despite this offense, legal proceedings were unsuccessful. The Hildesheim public prosecutor's office closed the case in 2025, invoking the statute of limitations. The discoverer nevertheless participated in supervised detection training, organized by the Niedersächsisches Landesamt für Denkmalpflege (NLD), the regional body responsible for heritage protection. This first phase opened the way to a broader investigation, this time official, which would reveal the full extent of the treasure.
A supervised archaeological excavation reveals the scale of the deposit
Indeed, as soon as the discoverer's declaration was made in April 2025, the archaeological authorities reacted quickly. The NLD, the City of Hildesheim and the district monument protection organized a joint inspection. The objective? Find the exact location of the 2017 discovery and assess the damage inflicted on the site. The operation continued in October with a complete scientific excavation, carried out by professional archaeologists, within a strict methodological framework.
Despite the alteration of the soil, specialists were able to locate the burial point and recover several objects still in place. This work added new items to the initial inventory. The final balance sheet lists around 450 silver coins, several silver ingots, a gold ring and a gold coin. The whole forms a hortus – a voluntary deposit – typical of Roman Antiquity.
© Bartels, PI Hildesheim, ZKD/FK Forensics
Pins.
The state of conservation of the pieces, although variable, remains generally good. These artifacts had not been cleaned or modified by their discoverer, making them easier to document. Experts identified metal pins, probably linked to missing textiles. This opens up clues about the burial context. The team still hopes to find micro-traces in the sediments.
The whole thing was transported to the NLD laboratories for conservation, restoration and analysis. This phase obviously remains essential to establish precise dating and identify the origin of the metals. These analyzes will also allow us to better understand the uses, gestures, and reasons behind this deposit. For now, only the exceptional scale of the treasure remains fully attested.
Complex dating and historical context to reconstruct
Nevertheless, the Borsum hoard is dated, at this stage, approximately between the end of the 1st century BC. BC and the 1st century AD. AD This period corresponds to the emergence of the Roman Empire, just after the fall of the Republic. More precisely, when emperors, starting with Augustus, consolidated their power. Roman activity was then intense as far as the borders of the Rhine. It marks a complex zone of contact with Germanic peoples.
The coins found most likely come from different periods of the imperial era. In fact, their numismatic analysis will make it possible to specify the terminus post quem (the most recent possible date of deposit). In a local press article, Sebastian Messal, archaeologist and regional manager at the NLD, confirms the considerable scientific importance of the discovery. It offers a rare opportunity to examine the economic, political and military circulations in the immediate periphery of the Empire.
It remains to be determined whether this deposit constituted booty, a commercial treasure or a ritual deposit. Several hypotheses coexist. This could be goods hidden in an emergency during a local conflict, or a monetary stock entrusted to a sanctuary or a local entity for votive or prestige reasons. The fact that it was carefully buried and not scattered argues for a deliberate intention of preservation or protection.
Bullion, gold, and the presence of non-monetary items suggest concentrated wealth. This points archaeologists toward a high-status owner. Future metallurgical analyzes could determine the geographic origin of the metals and thus shed light on cross-border trade at that time. A key to understanding the relations between Rome and the free peoples of Germany.
Heritage issues and awareness of clandestine excavations
This case illustrates in an exemplary manner the dangers linked to the illegal detection and pillaging of archaeological heritage. When a site is excavated without method, its context – that is, layers of sediment, alignments, structures or orientation of objects – is lost. However, these data prove essential to historical interpretation. Without them, a treasure becomes a simple pile of objects, deprived of meaning.
In Lower Saxony, as in other German Länder, the law strictly regulates the use of metal detectors. It is not a question of banning, but of training amateurs so that they participate in safeguarding heritage. The Landesamt für Denkmalpflege thus offers supervised detection courses, in which the discoverer of Borsum also participated after his late declaration. This type of initiative seeks to create cooperation between citizens and institutions.
The dismissal of the case by the prosecution, due to statute of limitations, did not prevent a public debate. How can we encourage people to declare finds without discouraging amateurs? Should penalties be reduced to encourage reporting? Or strengthen sanctions? At the same time, the authorities are banking on the public promotion of the discoveries. The Borsum treasure will soon be exhibited in the Hildesheim region, in order to inform and raise awareness.
Individual responsibility is at the heart of the issues here. Because archeology is not just a hobby! It is a discipline that relies on precision, method and collective memory. The Borsum treasure reminds us that every ancient object carries a story. But this story can only emerge if the context is preserved.
With an unwavering passion for local news, Christopher leads our editorial team with integrity and dedication. With over 20 years’ experience, he is the backbone of Wouldsayso, ensuring that we stay true to our mission to inform.
