French ship Diadème (1811)

Diadème was an 86-gun Bucentaure-class 80-gun ship of the line of the French Navy, designed by Jacques-Noël Sané.

Commissioned in Lorient in January 1812, Diadème was disarmed at the Bourbon Restoration. She had major refits in 1822 and 1833, and was reactivated in 1826 to join the squadron of the Mediterranean.

The ship was used as a barracks hulk from 1856 and was broken up in 1868.