Diadème was the lead ship of the Diadème-class 74-gun ship of the line of the French Navy.

HMS Greenwich was a 50-gun fourth rate ship of the line of the Royal Navy. She was built during the War of the Austrian Succession, and went on to see action in the Seven Years' War, during which she was captured by the French and taken into their service under the same name. She was wrecked shortly afterwards.