Druzno
lake in Poland
Drużno or Drużno (German: Drausensee, Lithuanian: Drūsuo) is a body of water historically considered a lake in northern Poland on the east side of the Vistula delta, near the city of Elbląg. As it is currently not deep enough to qualify as a lake hydrologically and receives some periodic inflow of sea water from the Vistula Lagoon along the Elbląg River, some suggest that it be termed an estuary reservoir. A village of recent origin also called Drużno is situated near the lake.
The German name Drausensee, in earlier records called Drusensee, is connected to the ancient trade city of Truso, which stood within the lands now occupied by Elbląg. The lake is greatly reduced from its original size partly due to large building expansion of housing in the last few decades, but mainly because of the natural death of the lake by sedimentation. The lake is the site of a nature reserve, one of the 13 sites in Poland protected under the Ramsar convention.
An old mention of the name is as a place named Truso in the report of sailor Wulfstan from the end of the 9th century. The report was included in The Voyages of Ohthere and Wulfstan which was written in Anglo-Saxon in King Alfred's reign.
Geography
The central coordinates of the lake are 54°4′N 19°27′E. It lies to the east of the Nogat, the main right branch of the lower Vistula, at the edge of the lowland of the delta (Żuławy Wiślane), which is a region of shifting sediments and channels partly controlled by dikes, dams and ditches. The lake is about 181 square kilometres (70 sq mi) in area and sometimes up to 1.8 metres (5.9 ft) below sea level.
The public source identifies “Druzno” as lake in Poland. This brief keeps that definition visible, then builds a research path around Druzno, lake and Poland.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Druzno”, the useful work is to connect “lake in Poland” to the records capable of establishing context and consequence.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Jul 25, 2026. The linked authority identifier is Q1255924. Authority coordinates are 54.105, 19.462. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Druzno”, its source revision and the description used here.
- Expand the search: follow Druzno primary sources, Druzno archive and Druzno research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Druzno”?
- Which authority defined the place, boundary or structure at the relevant date?
- Which earlier names or jurisdictions may reveal additional records?
Search terms from this dossier
This entry incorporates text from “Druzno” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.