Gäu District
district of the canton of Solothurn, Switzerland

Gäu District is one of the ten districts of the canton of Solothurn in Switzerland, situated in the centre of the canton. It has a population of 22,005 (as of 31 December 2020). Together with Thal District, it forms the Amtei (electoral district) of Thal-Gäu.
Municipalities
Gäu District contains the following municipalities:
Geography
Gäu has an area, as of 2009, of 62.01 square kilometers (23.94 sq mi). Of this area, 27.74 km2 (10.71 sq mi) or 44.7% is used for agricultural purposes, while 23.36 km2 (9.02 sq mi) or 37.7% is forested. Of the rest of the land, 10.41 km2 (4.02 sq mi) or 16.8% is settled (buildings or roads), 0.44 km2 (0.17 sq mi) or 0.7% is either rivers or lakes and 0.06 km2 (15 acres) or 0.1% is unproductive land.
Of the built up area, industrial buildings made up 3.1% of the total area while housing and buildings made up 6.6% and transportation infrastructure made up 5.0%. Power and water infrastructure as well as other special developed areas made up 1.5% of the area Out of the forested land, 36.4% of the total land area is heavily forested and 1.2% is covered with orchards or small clusters of trees. Of the agricultural land, 41.9% is used for growing crops, while 1.2% is used for orchards or vine crops and 1.6% is used for alpine pastures. All the water in the district is flowing water.
This brief starts where responsible research should: with the source description of “Gäu District” as district of the canton of Solothurn, Switzerland. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the places & architecture register because the source frames it as district of the canton of Solothurn, Switzerland. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Nov 8, 2024. The linked authority identifier is Q660290. Authority coordinates are 47.289, 7.714. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2020 and 2009.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. 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 “Gäu District”, its source revision and the description used here.
- Expand the search: follow Gäu District primary sources, Gäu District archive and District 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 “Gäu District”?
- Which earlier names or jurisdictions may reveal additional records?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “Gäu District” 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.