The marriage ceremony between Elisabeth and Ferdinand III was celebrated on 30 November 1219 in the city of Burgos.[2] In Castile, she assumed the name Beatrice, probably in honour to both her eldest sister, Empress Beatrice (who had died in 1212), and the youngest, who died alongside their mother in 1208 during childbirth.
In 1230, after the death of her father-in-law, King Alfonso IX of Leon, Beatrice became queen. During her marriage, Elisabeth gave birth to ten children:
Alfonso X (called the Wise) (b. Toledo, 23 November 1221 - d. Seville, 4 April 1284).[3]
Frederick (b. Guadalajara, bef. 15 September 1223 - executed in Burgos, 1277).[4]
Ferdinand (b. Cuenca, bef. 27 March 1225 - d. near Seville, bef. 23 November 1248).
Eleanor (b. 1226 - died young).
Berengaria (b. 1228 - d. Las Huelgas 1279), a nun at the Cistercian monastery Santa María la Real at Las Huelgas since September 1243.
Henry (b. bef. 10 March 1230 - d. Roa, 8 August 1303).[4]
Philip (b. bef. 5 Dec 1231 - d. 28 November 1274).[4]
Sancho (b. 1233 - d. Toledo, 27 October 1261), Archbishop of Toledo from 1251–1261.[4]
Manuel, Lord of Villena (b. Carrión de los Condes, 1234 - d. Peñafiel, 25 December 1283).[4]
Queen Beatrice died in Toro on 5 November 1235 aged 30. Her death was probably related to her last childbirth, or she even died after giving birth. She was buried in the Royal Monastery of Huelgas de Burgos, next to King Henry I. Later, her son Alfonso X transferred her body to Seville Cathedral in 1279, where that of her husband rested.
Arch and Garay, Ricardo (1954). Jerónimo Zurita Institute. National Research Council .. ed. Graves of the royal house of Castile. Madrid.
Elorza, Juan C.; Lourdes Vaquero, Belen Castillo, Martha Black (1990). Castilla y Leon. Ministry of Culture and Social Welfare. ed. Pantheon Real de las Huelgas de Burgos. The tombs of the kings of León and Castile (2nd edition). Editorial Evergráficas SA. ISBN84-241-9999-5 .
Gomez Moreno, Manuel . Diego Velazquez Institute. National Research Council .. ed.'s Pantheon Royal Huelgas de Burgos. Madrid.
^(ES)Luis Suárez Fernández, Historia de Espana antigua y media, (Ediciones Rialp, S.A., 1976), 29.
^ abc(ES)Acercamiento Mutuo de Espana y Alemania, Jaime Ferreiro Alemparte, España y Europa, un pasado jurídico común, ed. Antonio Pérez Martín, (Cometa S.A., 1986), 181.
^(ES)Carlos Alvar, Traducciones y traductores: materiales para una historia de la traducción en Castilla durante Edad Media, (Centro en Estudios Cervantinos, 2010), 113.
^ abcde(ES)Alfonso X en la Europa del siglo XIII, Carlos Estepa Diez, Alfonso X, ed. Miguel Rodríguez Llopis, (Editora Regional de Murcia, 1997), 22.
^According to Lucas de Tuy, Chronicon Mundi, Liber IV, p. 112, 115. she was already born (probably in early 1235) when her mother died, and predeceased her for a few days (morte Regina domina Beatrix and ante paucos dias...filia Regis Fernandi et Regine Beatricis Maria puellula).