Deaths on April 12

Margaret of Bourbon, Queen of Navarre

Died on April 12, 1256

Margaret of Bourbon, Queen of Navarre, regent of Navarre (b. c. 1217)

Margaret of Bourbon (French: Marguerite; c. 1217 – 12 April 1256) was Queen of Navarre and Countess of Champagne from 1234 until 1253 as the third wife of Theobald I of Navarre. After her husband's death, she ruled both the kingdom and the county as regent for three years in the name of their son, Theobald II of Navarre.

References

Margaret of Bourbon, Queen of Navarre

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Events on 1256

4 May

Pope Alexander IV
The Augustinian monastic order is constituted at the Lecceto Monastery when Pope Alexander IV issues a papal bull Licet ecclesiae catholicae.
15 Dec

Alamut Castle
Mongol forces under the command of Hulagu Khan enter and destroy the Hashshashin stronghold at Alamut Castle (in present-day Iran) as part of their offensive on Islamic southwest Asia.