Klara Izabella Pacowa

Klara Izabella Pacowa, born Claire Isabelle Eugenie de Mailly-Lespine (1631 - 11 March 1685), was a Polish court official.

The politically active queen Marie Louise used her ladies-in-waiting to form connections and alliances which could be of use to her in state affairs, and on 28 June 1654 she arranged for Klara Izabella to marry Krzysztof Zygmunt Pac.

Being the lady-in-waiting to the queen and constantly present at court, she formed valuable connections, protected the interests of her spouse and benefited him in the eyes of the royal couple, soothing any conflicts between them and him, and maintained connections with foreign rulers through their diplomats, whom she received as guests in the Belvedere Palace her husband had built for her as her residence in Warszaw in 1663.

[4] During the 1660s, P. de Bonzy referred to her and Maria Kazimiera Sobieska, her rival as favorite, as one of the two most important and influential women at the Polish court after the queen.

In 1676, she opposed the wedding between Michał Kazimierz Pac and the queen's sister Maria Anna d'Arquien de la Grange.