Skip to main content

Matilda de Dammartin (d. 1258)

Matilda de Dammartin (d. 1258)

Countess of Dammartin, countess of Boulogne, and wife of Alphonso III, king of Portugal . Name variations: Mahaut de Dammartin or Dammaratin; Mahault; Matilda of Dammartin or Dammaratin; Matilde. Died in 1258 (some sources cite 1257); daughter of Ide d'Alsace (c. 1161–1216), countess of Boulogne, and Reinaldo, count of Dammartin; married Philippe Hurpel, count of Clermont, in 1216; married Alphonso III, future king of Portugal (r. 1248–1279), around 1238; children: (first marriage) Jeanne de Clermont; (second marriage) Robert (b. 1239, died in infancy).

Born in the early 13th century, Matilda de Dammartin was the only child of Reinaldo, count of Dammartin, and Ide d'Alsace . In 1216, Matilda married Philippe Hurpel, count of Clermont, who died in 1234. Perhaps in 1238, she married again, this time to a Portuguese prince, the future Alphonso III, who was residing at the court of Louis VIII. Alphonso hoped to make his fortune in France. He also apparently envied and feared his brother Sancho II, who was then ruling Portugal. Matilda's marriage to Alphonso served his interests, as she was a wealthy heiress (the richest in France, according to some estimates).

When Portuguese nobles overthrew Sancho, Alphonso returned home to claim the throne, leaving Matilda in France. This led to a permanent separation between the couple, which Matilda apparently did not protest. When Alphonso tried to wed Beatrice of Castile and Leon (1242–1303) in 1253, however, Matilda sought redress from Pope Alexander IV, who excommunicated Alphonso. The marriage of Alphonso and Beatrice was celebrated in 1259, soon after Matilda's death in 1258.


O Grande Livro dos Portugueses. Lisbon: Círculo de Leitores, 1991.

Oliveira, Américo Lopes de, and Mário Gonçalves Viana. Dicionário Mundial de Mulheres Notáveis. Porto: Lello & Irmão, 1967.

Kendall W. Brown , Professor of History, Brigham Young University, Provo, Utah

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Matilda de Dammartin (d. 1258)." Women in World History: A Biographical Encyclopedia. . 20 Apr. 2019 <>.

"Matilda de Dammartin (d. 1258)." Women in World History: A Biographical Encyclopedia. . (April 20, 2019).

"Matilda de Dammartin (d. 1258)." Women in World History: A Biographical Encyclopedia. . Retrieved April 20, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.