Birth and early life In 1859,
Antoine, Duke of Montpensier, son of King
Louis Philippe I of France, and his wife,
Infanta Luisa Fernanda—sister of Queen
Isabella II of Spain—traveled to Madrid. The Duke intended to offer his services in the
War of Africa. However, his offer was ignored by both Prime Minister
Leopoldo O'Donnell and Queen Isabella II, who wished to prevent him from gaining further political notoriety. Resentful, the Duke departed for Claremont House near
London to visit his mother, leaving his pregnant wife in Madrid. In May 1860, the Duke returned to Madrid, where the Queen invited the couple to remain at Court for the birth of their child. Maria de las Mercedes was born in Madrid on June 24, 1860. She was baptized that same evening in the chapel of the
Royal Palace of Madrid. Her godparents were her aunt and uncle, Queen Isabella II and her consort,
Francis, Duke of Cádiz. From 1849, the family’s primary residence was the
Palace of San Telmo in
Seville. In the autumn of 1867, several high-ranking generals and officials conspired to offer the Spanish crown to the Duke of Montpensier should it become vacant. Although the Duke was informed of this agreement in early 1868, he reportedly gave no official response. Later that year, the Duke financed plans to overthrow Isabella II. Consequently, the government forced the family into exile in
Lisbon in July 1868. Following the success of the
Glorious Revolution in September, which sent Isabella II into exile, the family returned to Seville in 1869.
Engagement and marriage Isabella II abdicated her rights to the throne in favor of her son, Alfonso, on June 25, 1870. In 1871, Isabella sent an envoy to Seville to negotiate an agreement with the Duke of Montpensier. Under the terms, the Duke recognized Alfonso’s rights, a potential regency was outlined, and a marriage between Alfonso and Maria de las Mercedes was proposed, provided the parties agreed. In 1872, the Duke of Montpensier, then under investigation for the assassination of General
Juan Prim, moved to France. In January of that year, the Duke and his family met with Isabella II in Paris to reconcile and show support for the Bourbon restoration. This resulted in the **Cannes Agreement**, where the Duke formally supported Alfonso's candidacy for the throne. During Christmas 1872, Isabella II and Alfonso were invited by the Montpensiers to the Chateau de
Randan. It was there that Alfonso fell in love with Maria de las Mercedes, and the two became engaged. Following the
Restoration in December 1874, Alfonso was proclaimed King as
Alfonso XII. The Royal Family returned to Spain definitively in October 1876. Alfonso XII met them in Madrid, where he renewed his vow of love to Mercedes. On December 7, 1877, the King formally requested her hand in marriage via the
Duke of Sesto. The proposal was formally accepted at the Palace of San Telmo, where Mercedes received a gold, ruby, and diamond bracelet as a gift from the King. The royal wedding took place on 23 January 1878, at the
Basilica of Nuestra Señora de Atocha in Madrid. Isabella II, who had reluctantly accepted the match, did not attend the ceremony.
Illness and death . In March 1878, shortly after the royal honeymoon, it became evident that the Queen was unwell. She suffered a miscarriage following a long horse ride and subsequently fell ill. While she appeared to recover briefly, her health began to decline steadily in late May. On June 22, she began suffering from hemorrhages. Maria de las Mercedes died on June 26, 1878, at the age of 18; her marriage had lasted only five months and three days. The official medical report cited "nervous gastric fever," though modern historians and contemporary reports believe she died of
typhoid fever or
typhus. She was initially buried at
El Escorial, as she was not the mother of a King. However, in accordance with the wish of Alfonso XII, her remains were transferred to
Almudena Cathedral in Madrid on November 8, 2000. Her white marble tomb bears the Latin inscription: ==Legacy==