He was the lover of Louise Marie Adélaïde de Bourbon after the death of her husband the duke of Orleans.
Below the breast is a Wedgwood medallion which Colin Eisler has identified as Poor Maria, possibly a reference to the life of the duchess, which was later destroyed because of the Revolution.
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In the 2006 film Marie Antoinette, Marie-Adélaïde had a minor role played by the French actress Aurore Clément.
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However, Albert Casimir, Duke of Teschen and Louise Marie Adélaïde de Bourbon came to Naples to support the queen and the Freemasons, strengthening the queen's bond with Caramanico and causing the fall of Tanucci.
His sister Louise Marie Adélaïde de Bourbon, future Duchess of Orléans would move Jean Marie's body to the Royal Chapel, Dreux; Dreux is today the burial site of the Royal House of Orléans which descends from Marie Adélaïde and her husband, Philippe Égalité.
Buried at the chapel at the Château de Rambouillet, he was later moved by his posthumous sister Louise Marie Adélaïde de Bourbon (wife of the future Philippe Égalité) to the Chapelle royale de Dreux.