 On 3 April 2000, comparisons of mitochondrial DNA from the heart and the hair of Marie Antoinette and her two sisters have confirmed the authenticity of the heart.DNA analysis of the heart of the dead child in the Temple is contested by the Survivantists because they claim it might belong to the older brother of Louis XVII, Louis-Joseph, the first Dauphin who died in 1789.However, the heart of Louis-Joseph was embalmed according to royal tradition, as attested by the archives, while that of Louis XVII was preserved in alcohol, which immediately makes confusion impossible.