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In page Maria Antonia of Austria:

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Archduchess Maria Antonia was born in Vienna on 18 January 1669,[1][2] the eldest daughter of Leopold I, Holy Roman Emperor born from his first marriage to his niece, Infanta Margaret Theresa of Spain.[3] Her only older sibling had already died by the time she was born.[4] She had two younger siblings, both of whom died in infancy,[5] and twelve half-siblings, six of whom lived into adulthood.[6] Since her childhood, Maria Antonia was an intelligent and cultivated girl, sharing her parents' passion for music.[citation needed]