In 1802, Sophie married Anne-Charles Lebrun, the eldest son of Charles-François Lebrun later duc de Plaisance. The marriage was unhappy and the couple separated without ever taking divorce; Sophie lived in Italy while the Duc served as the Governor of Holland from 1811-1813. Upon the outbreak of the Greek War of Independence, the Duchess and her daughter generously supported the Greek cause and in 1830, they moved to Nafplion, the capital of Greece at that time and she was reacquainted with the Greek leader Ioannis Kapodistrias whom she had met in Paris in 1826. She became an ardent financial supporter of public education. Eventually, she became an opponent of Kapodistrias, and after a 17-month stay, she left for Italy. When Kapodistrias was assassinated by Konstantinos Mavromichalis and his nephew Georgios Mavromichalis, she spoke out against the way Kapodistrias had run the Greek government. In 1834, the Duchess returned to Greece and settled in the new capital Athens. She purchased large amounts of agricultural land chiefly near Mt. Penteli, but all around Athens. She engaged the Greek architect, Stamatios Kleanthis to design a palace for her on the slopes of Mt. Penteli. Meanwhile, in 1836, the Duchess and her daughter traveled to Beirut, where Eliza died of pneumonia. Such was the sorrow of the Duchess that she had her daughter's body embalmed and returned to Athens where it was placed in a crypt under her temporary home on Peiraios Street. Kleanthis completed the Tower of the Duchess of Plaisance in 1841 and then set to work on, which was completed in 1848. Today the Villa Illisia is the site of the Byzantine Museum. A central fixture in the social life of Othonian Athens, the Duchess would host symposia on various topics of religion and politics in her palace. She was also known to dole out funds and titles of courtesy to those whom she found favorable. Something of an iconoclast, the Duchess rejected the prevailing faith, Greek Orthodoxy, and instead converted to Judaism. She sponsored the building of a Jewish temple in Halkida, Euboea. Later in life, she commissioned Kleanthis to begin the construction of a final home and resting place for her beloved daughter's remains, the Castle of Rododafni. She would never live to see the house completed. In 1847, it caught fire and was burned to the ground. After that, the Duchess withdrew from public life only agreeing to see her old friend, Fotini Mavromichali, Lady-in-waiting for Queen consortAmalia of Oldenburg. She died in 1854 and her nephew sold her lands to the Greek state. She is buried with her daughter in her Tower near Penteli.
