In 1656, Diego Velazquez painted Margaret Theresa of Spain into the center of Las Meninas. She was five years old, wearing a silver dress. She had already been promised to her uncle Leopold I, Holy Roman Emperor. She would be dead at twenty-one, four months pregnant, after seven pregnancies in six years.
Her parents were Philip IV of Spain and Mariana of Austria. Mariana was Philip's niece, originally engaged to Philip's son Balthasar Charles. When the boy died of smallpox at sixteen, Philip married the girl himself. He was forty-four. She was fourteen. Over eighty percent of Spanish Habsburg marriages were consanguineous, uncle to niece and first cousin to first cousin for two hundred years, with papal dispensation granted every time.
Margaret left Spain at fourteen after a proxy wedding on April 25, 1666. She reached Vienna eight months later. Leopold commissioned Il pomo d'oro, an eight-hour opera by Antonio Cesti, for her seventeenth birthday. He asked her to call him Uncle. Between 1667 and 1672 she carried seven pregnancies. Ferdinand Wenceslaus died at three months. Johann Leopold died the day he was born. Maria Anna Antonia lasted fourteen days. Only Maria Antonia survived. Margaret died March 12, 1673, at the Hofburg Palace, twenty-one years old and four months pregnant.
Her brother Charles II, born a decade later, had an inbreeding coefficient of 0.254, higher than the child of a brother-sister union. He could not chew his food. His tongue was too large for his mouth. He was infertile and epileptic, dead at thirty-eight. The Spanish called him El Hechizado, The Bewitched. Modern geneticists attribute his condition to at least two distinct recessive genetic disorders: combined pituitary hormone deficiency and distal renal tubular acidosis.
A 2019 study by Professor Roman Vilas at the University of Santiago de Compostela correlated jaw deformity with inbreeding coefficient across sixty-six portraits and a genealogy of six thousand individuals. The paintings are the data. Philip IV fathered between thirteen and fifteen legitimate children. Two survived to adulthood. The Spanish Habsburg line ended with Charles in 1700, no heirs, and a throne that passed to the House of Bourbon after the War of the Spanish Succession.
📍 TIMESTAMPS:
0:00 — The Girl With Ten Grandparents
0:33 — The Painting You Already Know
1:10 — A Sales Brochure Sent to Vienna
1:51 — Leopold I and the Habsburg Jaw
2:36 — The Habsburg Marriage Machine
3:37 — When the Dynasty Split in Two
4:28 — What Is an Inbreeding Coefficient?
5:15 — Philip IV Marries His Dead Son’s Fiancée
6:04 — Five Children. Three Dead.
6:47 — Two Survivors Out of Fifteen
7:48 — Margaret’s Childhood in Madrid
8:49 — The Betrothal: Sold at Eight
9:18 — The Eight-Month Journey to Vienna
10:54 — An Eight-Hour Opera for a Teenage Bride
12:04 — "Call Me Uncle"
13:38 — Seven Pregnancies in Six Years
14:30 — Johann Leopold: Dead the Day He Was Born
16:01 — The Fever That Killed Her
17:00 — Leopold Remarries Within Four Months
19:36 — Charles II: The Last Spanish Habsburg
22:14 — The Autopsy of Charles II
23:24 — How Inbreeding Destroys a Bloodline
24:41 — The Vilas Study: Portraits as Medical Data
26:12 — The Ratchet: Why It Only Got Worse
27:34 — Back to the Painting
📚 SOURCES & FURTHER READING:
https://en.wikipedia.org/wiki/Margaret_Theresa_of_Spainhttps://www.unofficialroyalty.com/margarita-teresa-of-spain-holy-roman-empress/https://daily.jstor.org/who-was-the-little-girl-in-las-meninas/https://mairedding.substack.com/p/the-tragedy-of-margaret-theresa-ofhttps://museupicassobcn.cat/en/whats-on/discover-online/infanta-margarita-maria-tragic-icon📋 ABOUT THIS VIDEO:
Margaret Theresa of Spain (born July 12, 1651, died March 12, 1673), the Infanta depicted in Diego Velazquez's Las Meninas (1656) at the Museo del Prado in Madrid, was married to her maternal uncle Leopold I, Holy Roman Emperor, by proxy on April 25, 1666, at age fourteen. She traveled from the Royal Alcazar of Madrid to the Hofburg Palace in Vienna over eight months, arriving November 1666. She bore four children between 1667 and 1672: Ferdinand Wenceslaus (died at three months), Maria Antonia (survived), Johann Leopold (died February 20, 1670, the day of his birth), and Maria Anna Antonia (died at fourteen days). Margaret died at age twenty-one, four months pregnant, of fever complicated by thyroid disease and six continuous years of pregnancy. Her brother Charles II of Spain (1661-1700), El Hechizado, had an inbreeding coefficient of 0.254 and suffered mandibular prognathism, macroglossia, epilepsy, combined pituitary hormone deficiency, and distal renal tubular acidosis. Philip IV of Spain fathered thirteen to fifteen legitimate children across two marriages to Elisabeth of France and Mariana of Austria; two survived to adulthood. Over eighty percent of Spanish Habsburg marriages between 1516 and 1700 were consanguineous.
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