French ship Diadème

Two ships of the French Navy have borne the name Diadème, after the diadem, a type of crown.
 * FRENCH SHIP Diadème, a 74-gun Diadème-class ship of the line, launched 1756. Renamed Brutus 1792. Razeed to a 42-gun frigate 1794. Broken up 1797.
 * FRENCH SHIP Diadème, an 86-gun Bucentaure-class ship of the line. Launched 1811. Hulked 1856.