Marie Eleonore of Dietrichstein, was a German noblewoman by birth member of the House of Dietrichstein and by her two marriage Countess of Kaunitz and Oppersdorf.
Background
Born in Vienna, she was the fourth child and third (but second surviving) daughter of Maximilian, 2nd Prince of Dietrichstein zu Nikolsburg, and his first wife Anna Maria, a daughter of Karl I, Prince of Liechtenstein and Duke of Troppau and Jägerndorf.
Career
They had one son:
Dominik Andreas I (30 November 1654 – 11 January 1705), Count of Kaunitz. Married on 25 November 1675 to Countess Maria Eleonore of Sternberg. They had eight children.
One of his descendants, Countess Maria Eleonora of Kaunitz-Rietberg, became in the first wife of Klemens von Metternich.
In Hodonín on 15 April 1663 Marie Eleonore married secondly with Bedřich Leopold (Frederick Leopold. Doctorate 22 January 1699), Count of Oppersdorf.
They had no children. Marie Eleonore died in Brno aged 64.