During underwater archaeological investigations in Switzerland, remnants of a Roman cargo from a vessel that submerged nearly two millennia ago were recovered from the bed of Lake Neuchâtel. The Cantonal Office for Archaeology of Neuchâtel (OARC), in partnership with the Octopus Foundation and the Archaeological Service of the Canton of Fribourg (SAEF), has been conducting excavations since March 2025. These efforts have successfully led to the identification, documentation, and retrieval of several hundred submerged artifacts, constituting an unparalleled archaeological assemblage within Switzerland and the inland waters north of the Alps.
The discovery was initially prompted when an aerial photographic survey, part of OARC’s routine monitoring of the lakebed and underwater heritage, revealed an unusual concentration of materials at depth. Subsequent dive inspections confirmed the scale of the find: remains of a shipwreck dating back to the period between 20 and 50 AD. While no structural remnants of the hull remain, its cargo was preserved on the lake floor in remarkably excellent condition.
The richness and diversity of the recovered articles led archaeologists to categorize this collection as exceptional. The urgency of the situation mandated the immediate commencement of the first excavation campaign, aimed at assessing the site’s potential and, critically, safeguarding the artifacts from various threats.
Despite their apparently good state of preservation, the fragility of the environment is extreme. The lake bottom is subject to constant erosion, anchored pleasure boats in the vicinity pose an ongoing risk of damage, and, more seriously, there is an unseen danger of looting and malicious interference. To mitigate these perils, the most delicate objects were systematically brought ashore following thorough on-site documentation.
The cargo itself is a mix of items originating from both regional and distant territories. The largest segment of the collection comprises hundreds of ceramic vessels, which, almost miraculously, survived intact. These are predominantly tableware—plates, dishes, cups, and bowls—whose manufacture is attributed to regional workshops situated on the Swiss Plateau.
Alongside the locally made crockery, the significant presence of numerous amphorae, used for transporting olive oil imported from the Iberian Peninsula, underscores this area’s integration into the extensive long-distance trade networks characteristic of the Roman Empire.
However, the archaeological significance of this complex extends beyond pottery. Among the recovered items are domestic objects and tools connected to the daily routines of the ship’s crew. Archaeologists also pinpointed components belonging to harnesses and wagons, notably featuring wheels in pristine condition—these represent the sole known Roman examples of their kind discovered in Switzerland.
The inclusion of these components suggests a dual transport system was in operation, where goods moved between land and water routes using a combined logistical infrastructure.
The discovery of weaponry, specifically several gladii, or short swords, introduced an element of particular interest for the historical interpretation of the incident. The juxtaposition of a civilian-type cargo with the presence of arms implies that the ship sinking between 20 and 50 AD was likely not a dedicated military vessel but rather a merchant craft sailing under armed escort. This offers a new perspective on security protocols along regional trade routes during the first half of the first century.
The research prospects opened by this discovery are considerable. Those leading the excavations emphasize that the cargo, owing to its superb state of preservation and its context within a clearly defined archaeological setting, serves as a source of invaluable data.
Further study is anticipated to enhance understanding of ancient trade exchange networks, contemporary technical expertise, and to precisely identify the potteries responsible for the recovered tableware. The collected items also provide a unique avenue for analyzing the distribution channels for manufactured goods within the Roman Imperial sphere.
In parallel with the scientific inquiry, the participating institutions have developed a plan for public dissemination of the findings. Upon completion of the initial specialized assessment phases, the objective is to share the results with the public through an exhibition at the Laténium, the archaeological park and museum of Neuchâtel, which already houses one of Switzerland’s most important collections from this era.
Before any public display can occur, the restoration teams face painstaking and essential work. Every object recovered, regardless of its seemingly good condition, requires stabilization and conservation treatment to ensure its future accessibility and to establish optimal ambient conditions for long-term preservation.
This meticulous process, which is already underway, is viewed as a fundamental act enabling future generations to study and appreciate a heritage that lay submerged for two millennia. The underwater operation led by OARC, supported by the Octopus Foundation and SAEF, thus reaffirms the critical role of preventive archaeology and inter-institutional collaboration in safeguarding underwater cultural heritage in Switzerland.
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