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Unexpected discovery in urban area reveals large medieval vessel preserved beneath Tallinn’s soil, with rare dimensions and historical objects that help reconstruct 14th-century maritime trade in Northern Europe.
While advancing with the foundation of a commercial building in Tallinn, the capital of Estonia, workers came across a medieval ship 24.5 meters long, buried about 1.5 meters below the surface on Lootsi Street, an area near the old historic port.
Recorded on March 31, 2022, the find was identified by the Estonian Maritime Museum as the Lootsi shipwreck, classified among the largest medieval vessels ever found in Europe, due to its impressive size and unusual hull preservation.
Beneath the urban soil, the structure surprised experts both by its size and its state of preservation, as a large part of the hull remained intact after centuries, something considered rare in excavations carried out in densely occupied contemporary urban environments.
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With approximately 9 meters in width, 4 meters in height, and an estimated weight of 97.7 tons, the ship reinforces the relevance of the find, according to data released by the museum responsible for the analysis and conservation of the archaeological material found on site.
The wood was dated using dendrochronology, a technique that examines tree growth rings, allowing for precise determination of the period when the material was used in the construction of the vessel.
The results indicated cutting around 1360, placing the ship in the context of the 14th century, a phase marked by intense commercial flow between ports of the Baltic Sea and the North Sea, strategic regions for the exchange of goods in medieval Europe.
Historic area linked to Tallinn’s port
Located on Lootsi Street, the excavation took place in an area historically linked to Tallinn’s old port, where the current landscape, dominated by modern buildings, contrasts with the maritime dynamics that characterized the space during the Middle Ages.
Initially classified as a cog, a type of single-masted merchant ship widely used in Northern Europe, the specimen began to be re-evaluated by specialists due to structural characteristics suggesting a possible relation to hulk-type vessels.
Although this revision is ongoing, the Estonian Maritime Museum maintains the designation of Lootsi cog in its institutional communication, while complementary studies seek to clarify the typology of the found vessel with greater precision.
The hull’s dimension reinforces the scientific value of the find, as, instead of dispersed fragments, archaeologists identified a large-scale preserved structure, extending from the side to areas near the deck, something uncommon in urban excavations.
Found objects reveal medieval routine and navigation
During the excavation, in addition to the main structure, various objects associated with the ship’s operation and daily life were identified, expanding the potential for studying life aboard and maritime practices of the medieval period.
Among the items mentioned by the Estonian Maritime Museum are tools, leather shoes, weapons, remains of ship rats, and a metallic compass equipped with a compass rose, an element directly linked to navigation of the era.
This compass drew special attention among researchers, being considered, according to the museum and public broadcaster ERR, possibly the oldest preserved dry compass in Europe, which significantly increases the historical value of the discovered ensemble.
Organic traces, such as remains of ship rats, also provide relevant clues about sanitary conditions, food storage, and challenges faced during 14th-century sea voyages, contributing to broader analyses of the historical context.
From these elements, it becomes possible to understand not only construction techniques but also operational and social aspects of medieval navigation, including provisioning, circulation of goods, and occupation of the vessel’s internal spaces.
Complex operation for the removal of the medieval ship
Due to the vessel’s size, its removal required detailed technical planning, as the integrity of the structure needed to be preserved throughout the process of extraction from the urban soil where it remained buried for centuries.
To enable transport, the team opted to divide the ship into four parts, a stage preceded by more than three months of preparation, involving structural reinforcement, stability analysis, and definition of appropriate logistics for the displacement.
The transport to the Estonian Maritime Museum lasted approximately 13 hours, carried out with specialized equipment capable of supporting the weight and volume of the sections, minimizing risks of damage to the archaeological material.
After removal, the hull began to be kept in a controlled environment, an essential condition to prevent deformations, wood drying, and proliferation of biological agents that could compromise the structure’s conservation.
In the museum space, technical teams began cleaning, documentation, measurement, and sample collection procedures, gathering fundamental data for in-depth studies on the ship’s origin, construction, and trajectory.
Historical importance of the Lootsi shipwreck
Located on one of medieval Europe’s main trade axes, the Lootsi shipwreck reinforces Tallinn’s historical relevance as a strategic point on the maritime routes that connected different regions of the continent during the 14th century.
At the same time, the case highlights how large structures can remain hidden beneath modern cities, revealing preserved historical layers even in areas subjected to intense urbanization over centuries.
For decades, the vessel remained buried under a busy area of the Estonian capital, revealed only by a routine excavation, which underscores the fortuitous nature of the discovery and its importance for archaeology.
The combination of impressive dimensions, state of preservation, and presence of associated objects makes the find particularly relevant, allowing for detailed investigations into shipbuilding, navigation, and medieval maritime trade.
With analyses conducted by the Estonian Maritime Museum and support from international specialists, the material remains in the conservation process, with the prospect of a future public exhibition that will integrate the ship into the region’s historical heritage.
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