When she became a widow during the Spanish Civil War, Archduchess Maria Antonia moved permanently to South America where she remarried.

She was given the baptismal names Maria Antonia Roberta Blanka Leopoldina Karole Josepha Raphaela Michaela Ignatia Aurelia, but was called Mimi, by her family.

Theirs was a multi cultural household as Archduchess Maria Antonia's paternal ancestors had reigned in Austria, Tuscany and the Kingdom of the Two Sicilies.

[2] Maria Antonia's eldest brothers, Archdukes Rainer and Leopold, remained in Austria and they recognized the new republic.

At the same time Infanta Blanca and her husband wanted to see if there were any properties they could claim from Archduke Ludwig Salvador's uncle who had died a decade earlier, unmarried.

She fell in love with Ramon Orlandis y Villalonga (1896–1936), who belonged to the minor Spanish nobility, but like the Archduchess, he lacked personal fortune.

The couple lived in Mallorca where they were the parents of five children who bore the surname Orlandis y Habsburgo: Archduchess Maria Antonia's husband died during the Spanish Civil War in 1936.