A death mask of Napoleon Bonaparte has been cleaned and conserved to mark the 200th anniversary of the French emperor's death.
The bronze, which is a direct impression of Napoleon's face at the time of his death, will go on display at Apsley House in central London.
The Hyde Park townhouse - home of Napoleon's arch nemesis the Duke of Wellington - reopens later this month.
Napoleon died in exile at the age of 51 exactly 200 years ago, on 5 May 1821.
Napoleon as Mars the Peacemaker has also been cleaned ready for the reopening on 19 May.
The 11ft 3½in (3.45m) statue by Antonio Canova depicts the 5ft 6in (1.67m) dictator as the Roman god Mars.
Sculpted between 1802 and 1806, it was declared "too athletic" by Napoleon and never displayed in public.
After the Battle of Waterloo in 1815, in which Napoleon was defeated by the Duke of Wellington, it was bought by the British government and given to the duke as a gift.
Napoleon Bonaparte: key dates
- 1769 - Born in Ajaccio, Corsica
- 1785 - Graduates from military academy in Paris
- 1795 - Commands French revolutionary troops who defeat royalist rebels in Paris
- 1796-1802 - Wins key battles against Austria, Prussia and others
- 1804-05 - Crowns himself emperor then defeats Austrian and Russian troops at Austerlitz
- 1812-14 - Campaign in Russia results in disastrous retreat; forced to abdicate and exiled on Elba island
- 1815 - Escapes from Elba, then defeated by British and Prussians at Waterloo; exiled to St Helena, where he dies six years later