 She died at Hildburghausen on 28 November 1837 and was buried quickly and discreetly.Her companion, Leonardus Cornelius Van Der Valck (called the "Dark Count") lived there until his death on 8 April 1845.DNA analysis conducted in 2013 has disproved the conjecture that the Dark Countess was the true Princess Marie Thérèse Charlotte of France.