Known as the 'Dark Countess', many believed she was none other than Marie Thérèse Charlotte de Bourbon - daughter of the French King Louis XVI and his wife, Marie Antoinette, who were executed during the French Revolution. Rarely seen in public and always veiled, she lived under the protection of the Duke and Duchess of Saxony- Hildburghausen in castle of Eishausen.

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They are exhuming her grave to collect DNA evidence that can prove once and for all whether the Dark Countess was in fact the ill-fated princess.
After her parents were guillotined Marie Thérèse was imprisoned in the 'Temple', a notorious former fortress used as a prison during the Reign of Terror.
Accepted historical dogma is that afterwards she was taken to Vienna, the capital city of her cousin, the Holy Roman Emperor Francis II, and also her mother's birthplace.
It was speculated that she would have refused to rejoin society after her traumatic time in the Temple, where it is rumoured she was subjected to cruelties by the guards - and perhaps even pregnant from rape - and was replaced by Ernestine Lambriquet, her half-sister and childhood companion.
The Count gave her name as Sophie Botta, a single woman from Westphalia and refused to confirm what the relationship between the pair was.
When she died in November 1837 she was quickly buried, possibly without a religious service, intensifying the speculation.
A physician said she appeared to be around 60 years old when she died- which would match the age of Marie Thérèse.
'I am personally convinced that the Madame Royale , the French king's daughter, is buried here,' said Mayor Hildburghausen Harz Steffen, reports Die Welt.
He welcomes the grave opening, but many residents want to prevent it to maintain the air of mystery surrounding a tale that would not look out of place in a Dan Brown novel.
Central German Radio has sought to allay those fears and say the project will be respectful.
'The grave of the Dark Countess and the remains will be treated with the utmost care and with due regard for piety and dignity,' said editor Eva Hempel.
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