A bicorne that belonged to Napoléon I will be the star lot at a two-day auction of Napoleon memorabilia from the collection of the Prince’s Palace of Monaco.

The black felt hat with two horizontal points has become emblematic of the French emperor and is “believed to have been worn during his stay on the Island of Elba,” according to the auction house Osenat. The hat first came from Joseph Giraud, vet to the Imperial Household, and it carries an estimate of €300,000‑400,000. Napoleon is known to have owned numerous hats, some of which can now be found in museums around the world, and he wore them with the brim aligned to his shoulders to differentiate himself from his officers.