Östersundom
55th neighbourhood of Helsinki, Finland
Östersundom (previously known in Finnish as Itäsalmi) is a subdistrict of Helsinki, Finland, near to the border of Sipoo. The area previously belonged to the municipality of Sipoo, but it was annexed to Helsinki on January 1, 2009 as part of the Southwest Sipoo Association (Finnish: Lounais-Sipoon osakuntaliitos), although the municipality of Sipoo opposed the idea.
Östersundom Manor and its side manor Björkudden, where Zachris Topelius lived for the last years, are located in Östersundom.
Begin with the source’s own compact description: “Östersundom” is 55th neighbourhood of Helsinki, Finland. The dossier treats that line as a proposition to test through Östersundom, 55th and neighbourhood, not as a finished interpretation.
Why this record matters
The phrase “55th neighbourhood of Helsinki, Finland” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Nov 30, 2025. The linked authority identifier is Q678399. Authority coordinates are 60.258, 25.194. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2009.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Östersundom” 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.