after
Titian, 17th century. in Granada was built upon his wedding to Isabel of Portugal in 1526. As the eldest daughter of Manuel the Fortunate, Isabella was a rather attractive candidate for marriage. The ideal candidate for her husband was her first cousin Charles, son of Maria's sister,
Joanna I of Castile and her husband
Philip, Duke of Burgundy. Their marriage would bring a strong alliance between Spain and Portugal, in accordance with the wishes of their grandparents,
Isabella I of Castille and
Ferdinand II of Aragón. It would also facilitate the continued exploration of the oceans without incurring clashes, as Portugal was the only naval power that could challenge Spain's supremacy in the
Atlantic Ocean. Plus, as Charles was sovereign of multiple kingdoms, it was necessary that Portugal, Christendom's richest kingdom, would fall under Spain's orbit and not of
France, which had happened in the
War of Castilian Succession. Moreover, because he had been raised in Burgundy, the Spanish nobles and subjects reportedly insisted that he should marry a princess from the Iberian peninsula. However, the 18-year-old Charles was in no hurry to marry and instead sent his sister
Eleanor to marry Isabella's widowed father in 1518. Charles's Flemish advisors, especially
William de Croÿ, later convinced him to relegate the Portuguese alliance to the background and replace it with an alliance with
England. In 1521, Charles became engaged to his other first cousin,
Mary Tudor, daughter of
Henry VIII and
Catherine of Aragon, who was 16 years younger than Charles and still a child. Their engagement sought to undo an alliance between England and France articulated by the ambitious Cardinal
Thomas Wolsey. Many in Portugal took their Infanta's rejection as an offense, but Isabella remained determined she would marry her powerful cousin or enter a convent. By 1525, Charles was no longer interested in an alliance with England and could wait no longer for Mary to get older because he was determined to have legitimate children. His engagement was called off, the alliance with England was abandoned, and he finally sought to marry Isabella. There were many more advantages – she was closer to him in age (she was only 3 years his junior), fluent in Spanish, and offered a dowry of 900,000 Portuguese cruzados (or Castilian folds), which was more than enough to solve many of his financial problems brought on by the
Italian War of 1521–26. Charles wasted no time in securing a
papal dispensation for first cousins and the marriage contract for an alliance with Portugal was made - Isabella would marry him and her brother, King
John III of Portugal, would marry Charles' youngest sister,
Catherine of Austria. Charles intended to wed and then leave his future wife as regent to govern Spain while he went to
Central Europe to deal with political and religious troubles there. In January 1526, Isabella traveled to Spain. Upon her arrival, she met the
Duke of Calabria, the
Archbishop of Toledo and the
Duke of Béjar at the Spanish-Portuguese border. They escorted her to
Seville, where she would wait a week for Charles. In the end, their wedding took place the very next day just after midnight on 11 March in the Palace of
Alcázar of Seville. Although their marriage was political, Isabella captivated Charles, who tarried with her longer than anticipated. They honeymooned for several months at the
Alhambra in
Granada, where he ordered the seeds of a Persian flower that had never been seen before in Spain. The seeds eventually grew into red
carnation, which delighted her. He then ordered thousands more to be planted in her honour, establishing the red carnation as Spain's floral emblem. Despite the mutual affection the couple shared, their marriage was not easy and Isabella struggled with Charles's long absences. His first absence lasted from 1529 to April 1533. He remained in Spain for 2 years, only to depart again in December 1536. Although he came back briefly in 1538, he left almost immediately, returning in November 1539. As agreed by the nobles, their children were raised in Spain. She supervised their education and taught them Portuguese. She wrote to her husband regularly but often spent months without receiving letters. ==Regency==