HMS Plantagenet was a 74-gun third rate ship of the line

Ship of the line

A ship of the line was a type of naval warship constructed from the 17th through the mid-19th century to take part in the naval tactic known as the line of battle, in which two columns of opposing warships would manoeuvre to bring the greatest weight of broadside guns to bear...

 of the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

, launched on 22 October 1801 at Woolwich

Woolwich

Woolwich is a district in south London, England, located in the London Borough of Greenwich. The area is identified in the London Plan as one of 35 major centres in Greater London.Woolwich formed part of Kent until 1889 when the County of London was created...

. She was designed by Sir William Rule as one of the 'large class' 74s, and was the only ship built to her draught. As a large 74, she carried 24 pdrs on her upper gun deck instead of the 18 pdrs found on the middling and common class 74s.

Plantagenet was broken up in 1817.