HMS Valiant was a 74-gun third rate ship of the line of the Royal Navy, modelled on the captured French ship Invincible and launched on 10 August 1759 at Chatham Dockyard. Her construction, launch and fitting-out are the theme of the 'Wooden Walls' visitor experience at Chatham Historic Dockyard. She served under Augustus Keppel during the Seven Years' War. In 1799 she was placed on harbour service, and was eventually broken up in 1826.