Ruler · 1161 – 1201

Constance of Brittany

Lived 1161 – 1201. Duke of Brittany of Duchy of Brittany, 1166 – 1201.

Wikidata's English label: Constance, duchess of Brittany.

For the full story, the article on Wikipedia (CC BY-SA 4.0); this page holds what the record says of the reign.

Lived: 1161 – 1201; 40 years
In office: 35 years; one reign
Lines: 1; Duchy of Brittany
Left it: died in office; Wikidata's manner of death

Duke of Brittany

Duchy of Brittany · the 2nd of 4 dated reigns · 1156 – 1203

Conan IV of Brittany1156 – 1166

Constance of Brittany1166 – 1201

Geoffrey II of Brittany1181 – 1186

Arthur I of Brittany1196 – 1203

killed, executed or dead in battledeposed, abdicated, exiled or removeddied in officea second row: a reign that began before the last had ended — rival claimants, or a shared thronethis entry

Reigned 1166 – 1201 · 35 years · came to it aged 5

Came to it: the child of the ruler before, on record
Left it: died in officeWikidata's manner of death: natural causes; puerperal disorders

the term records: death in office

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Constance of Brittany in the atlas: the article, every line they sat in, and the map in their years.
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Wikidata Q234317 (CC0) · the reigns from Wikidata's P39 terms, the rulers' own articles read by grammar (sentences quoted above, CC BY-SA 4.0) and Kokkonen & Sundell where they code the line · data built 2026-10-06 · Pastlas v2.9.1, by Oleh Voronko. The published atlas and its data are for non-commercial use.