Gertrude of Dagsburg
French duchess and trouvere

Gertrude of Dagsburg (died 30 March 1225) was the reigning countess of Metz and Dagsburg (Dabo) between 1212 and 1225. She was duchess consort of Lorraine by her short-lived marriage to Theobald. She was also a trouvère composing poems set to music, which often revolved around tales of courtly love.
Her mother was Gertrude of Baden, and her father was of Albert II, count of Metz and Dagsburg (Dabo); she was his heiress.
Life
Gertrude was named after her mother, Gertrude of Baden, the daughter of Herman III, Margrave of Baden. The birth date of May 1205 (or as late as mid-1206) often assigned to her is questionable, as her mother was then 52 years old. A more plausible date is c. 1190.
Gertrude succeeded her father as countess on his death in 1212, by which time she had already married Theobald, soon to be Duke of Lorraine (1213), according to the Vitæ Odiliæ. Their betrothal occurred in September 1205, possibly when she was an infant.
“Gertrude of Dagsburg” enters the record as french duchess and trouvere. Crown Archives preserves that source wording while asking what Gertrude, Dagsburg and French can confirm, complicate or overturn.
Why this record matters
“Gertrude of Dagsburg” is worth following because a concise public description often conceals a longer documentary argument. Here, Gertrude, Dagsburg and French provides the most credible route into that argument.
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 Dec 6, 2025. The linked authority identifier is Q1776973. 2 of 2 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1225, 1212, 1205 and 1206.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. 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.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Gertrude of Dagsburg”, its source revision and the description used here.
- Expand the search: follow Gertrude of Dagsburg primary sources, Gertrude of Dagsburg archive and Gertrude 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 “Gertrude of Dagsburg”?
- What terminology or title could unlock a more precise catalogue search?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Gertrude of Dagsburg” 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.