- Archaeologists have uncovered traces of Stolzenberg, a deserted medieval city, in a remote Polish forest near the modern settlement of Sławoborze.
- Estimated to have been founded in the late 13th or early 14th century, the city was abandoned under unknown circumstances.
- Preliminary metal detector research in 2020 found over 400 metal artefacts, including belt fittings, coat clasps, and medieval coins.
- Further investigations, including drilling and geophysical research, revealed a central market, a street leading to the city gate, and over 1,500 underground anomalies suggesting ancient buildings.
- The Relicta Foundation, which conducted the research, aims to clarify the city's founding date and the reasons for its depopulation, with natural causes, trade decline, and wars being potential factors.
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