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Since the 1820s the ruins of a monumental building on Ostrów Lednicki (near Gniezno) have been a subject of interest both of lovers of monuments of the past and representatives of various historical disciplines.The building was built of local erratic boulders on one of the islands of Lednickie Lake, within the large earthworks and wooden fortifications, dendrochronologically dated on ca. 960. It was...
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