Elizabeth's marriage to King
Denis of Portugal was arranged in 1282 when she was 11 years old, receiving the towns of
Óbidos,
Abrantes and
Porto de Mós as part of her
dowry. It was only in 1288 that the wedding was celebrated, when Denis was 26 years old, while Elizabeth was 17. Elizabeth quietly pursued the regular religious practices of her youth and was devoted to the poor and sick. Such a life was taken as a reproach to many around her and caused ill will in some quarters. Elizabeth took an active interest in Portuguese politics and was a decisive conciliator during the negotiations concerning the
Treaty of Alcañices, signed by Denis and Fernando IV of Castile in 1297 (which fixed the borders between the two countries). In 1304, the Queen and Denis returned to Spain to arbitrate between
Fernando IV of Castile and James II of Aragon, brother of Elizabeth.Elizabeth would serve as intermediary between her husband and Afonso, during the Civil War between 1322 and 1324. The
Infante greatly resented the king, whom he accused of favoring the king's illegitimate son,
Afonso Sanches. Denis was prevented from killing his son through the intervention of the Queen, when she, in 1323, mounted on a mule, positioned herself between both opposing armies on the field of Alvalade in order to prevent the combat. Peace returned in 1324, once the illegitimate son was sent into exile, and the
Infante swore loyalty to the king. ==Dowager Queen==