You can help expand this article with text translated from the corresponding article in Catalan. (January 2023) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Catalan Wikipedia article at [[:ca:Ermessenda de Castellbò]]; see its history for attribution. You should also add the template {{Translated|ca|Ermessenda de Castellbò}} to the talk page. For more guidance, see Wikipedia:Translation.

Ermessenda de Castellbò (died 1237), was an Andorran feudal ruler. She was suo jure ruling Viscountess of Castellbò in Andorra 1226-1237. She was born to Arnalda de Caboet and Arnaud I de Castelbon. In 1208, she married Roger-Bernard II, Count of Foix. Through her, Andorra and Foix was united in 1278. She was a Cathar. Because of her Cathar faith, her and her father's remains were exhumed and burnt by Inquisitor Pere de Cadireta in 1267. ^[1]

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