Maria Aloysia of Dietrichstein
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Maria Aloysia of Dietrichstein (Maria Aloysia Franziska; 21 April 1700 – 13/17 December 1783), was a German noblewoman member of the House of Dietrichstein and by marriage Countess of Althann.
She was the seventh child and fifth (but second surviving) daughter of Walther Franz Xaver Anton, 5th Prince of Dietrichstein and his second wife Karolina Maximiliana, a daughter of Count George Christoph of Proskau.