Born Isabella Maria Luisa Antonietta Ferdinanda Giuseppina Saveria Dominica Giovanna at Buen Retiro Palace in Madrid, Isabella was an Infanta of Spain and grew up at the court of her grandfather, Philip V of Spain. Her father was the Spanish Prince Philip, who was Duke of Parma in Italy. Her mother was the 14-year-old Élisabeth of France, the eldest daughter of Louis XV of France. Isabella's parents' marriage was not happy, and for nearly 10 years Isabella remained an only child. Isabella was very close to her mother and was distraught when she died of smallpox in 1759. Henceforth, Isabella was convinced she would die young, as well.
Marriage
In 1760 a marriage was arranged between Isabella and Archduke Joseph of Austria, heir to the Habsburg Monarchy. After a marriage by proxy, Isabella was escorted to Austria. On 6 October 1760, at the age of 18, Isabella married Joseph II in a ceremony lasting for days. Joseph was thrilled with his new bride and overwhelmed Isabella with his love. In return, she increasingly locked herself away, so much so that shortly after their wedding, Isabella was plunged into melancholy. This marriage signaled the first marital union of Philip I of Castile's most senior descendant, with the Royal House of Habsburg-Lorraine.
Relationship with Maria Christina
The princess spent most of her time in the Viennese court, not with her husband, but with his sister, Archduchess Maria Christina, who later became, by marriage, Duchess of Saxony-Teschen. The two women seemed to have had a romantic lesbian affair. During the few years Isabella and Christina knew each other, they exchanged 200 letters and "billets" while living at the same court. They spent so much time together that they earned the comparison with Orpheus and Eurydice. Isabel and Mimi were united not only by a shared interest in music and art but also by a deep mutual love. Every day they wrote long letters to each other in which they revealed their feelings. While the letters of Maria Christina showed her happy nature, Isabel's feelings were mixed and, in her expressions of affection, showed a certain pessimism, reflecting her growing obsession with death. In one such letter, Isabella wrote: In a different letter, she wrote: "I am told that the day begins with God. I, however, begin the day by thinking of the object of my love, for I think of her incessantly." Only the letters of Isabella have been preserved; those of Maria Christina were destroyed after her death.
Pregnancies and depression
However, as wife of the heir to the throne, Isabella knew that her duty was to give birth to a healthy heir. Despite this, the princess developed disquieted feelings toward her husband, spurred by anxieties over sexual intimacy and the possibilities of pregnancy. By late 1761, one year into the marriage, Isabella was pregnant. It was an especially difficult pregnancy, and Isabella suffered symptoms of physical illness, melancholy and lingering fears of death. Joseph, infatuated and inexperienced, failed to fully understand his wife's misery. On March 20, 1762, after nine months of mental and physical strain, Isabella gave birth to a daughter they named Maria Theresa. Isabella remained bedridden for 6 weeks after giving birth. In August 1762 and January 1763 Isabella suffered two separate miscarriages that aggravated her mental unrest, causing her to fall into a depression that eroded her will to live. In 1763, Isabella was six months pregnant with a baby girl when she contracted smallpox. On 22 November of the same year, this brought on premature labor ending in the death of the child, who was given the name Maria Christina, a few hours after birth. In total, out of four pregnancies, only one child survived infancy.
Death
Isabella followed her daughter in death at Schönbrunn Palace in 1763, a week after giving birth to her. She was buried in Maria Theresa's vault in the Imperial Crypt Vaults in Vienna. Joseph could not find comfort and did not recover from the death of his wife. His second marriage to Princess Maria Josepha of Bavaria was unhappy and did not produce children. Subsequently, in August 1765, Isabella's father-in-law Francis I, Holy Roman Emperor died, and Joseph succeeded him as Holy Roman Emperor with the title of Joseph II. Isabella had predicted even before her death that their daughter would follow this same road shortly after. Her forebodings were fulfilled on 23 January 1770, when the little Archduchess Maria Theresa died at age 7 of pleurisy. The loss was overwhelming for Joseph. After the death of his only child, Joseph withdrew increasingly from public life.
