Blanche I of Navarre

Here is a revised and improved memorial biography of Blanche I of Navarre, based strictly on verifiable historical records:

Blanche I of Navarre (Spanish: Blanca de Navarra; Basque: Blanka) was born on 6 July 1387 in Pamplona, Kingdom of Navarre, the daughter of King Charles III of Navarre and his wife Eleanor of Castile (en.wikipedia.org). She passed away on 1 April 1441 in Santa María la Real de Nieva, Kingdom of Castile (en.wikipedia.org).

Blanche first became Queen consort of Sicily through her marriage to Martin the Younger, heir to the Crown of Aragon, by proxy marriage on 21 May 1402 and in person on 26 December 1402 in Catania (en.wikipedia.org). During her marriage, she served as regent of Sicily twice: initially from 1404 to 1405, during her husband's absence, and again from 1408 to 1415, including after his death in 1409 (en.wikipedia.org). Her leadership as vicaria was notable during this time, earning her popularity among Sicilians and symbolizing resistance to external domination (es.wikipedia.org).

Following the death of her elder sister, Juana, in 1413, Blanche became heir to the Navarrese throne. She returned to Navarre in 1415 and was formally recognized by the Cortes (parliament) in Olite on 28 October 1415 (en.wikipedia.org). On 6 November 1419 (by proxy), and in person on 10 July 1420, she married John, Duke of Peñafiel (later John II of Aragon) in Pamplona, thus later jointly ruling Navarre (en.wikipedia.org). Upon the death of her father Charles III on 8 September 1425, Blanche succeeded him as Queen regnant of Navarre; she and John were crowned together in Pamplona on 15 May 1429 (en.wikipedia.org).

A noteworthy aspect of her reign was a pilgrimage to Santa María del Pilar in 1433, during which she—and her court—established a devotional brotherhood marked by chivalric traditions, fasting, prayer, and the wearing of distinctive emblematic sashes (en.wikipedia.org).

Blanche’s death on 1 April 1441 in Santa María la Real de Nieva marked the end of her regnal role, after which her husband John continued ruling Navarre, despite tensions with their son Charles of Viana, the heir (en.wikipedia.org).

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The revised biography above preserves all well-supported facts—including birth and death dates, royal titles, regencies, marriage dates, and political significance—while omitting any uncertain details.