The ossuary now contains the remains of approximately six million Parisians, transferred there gradually between the late eighteenth and mid-nineteenth centuries as graveyards were being closed because of the risk they posed to public health.
During the Revolution, people were buried directly in the Catacombs, including members of the Swiss Guard killed in the storming of the Tuileries palace on 10 August 1792 and victims of the massacres in September 1792. The remains of victims of the guillotine transferred there from their original burial pits include Lavoisier (1743 - 1794), ....Camille and Lucile Desmoulins (1760 - 1794 and 1771 - 1794), Danton (1759 - 1794) and Robespierre (1758 - 1794).”
Who knows which of those skeleton heads might have been one of these notable historic figures!