Answer:
HMS Victory
Despite its age, the HMS Victory might be one of the most well-known warships of all time. This was Lord Nelson's flagship at the Battle of Trafalgar but also took part in multiple other fights including the Battles of Ushant, the Battle of Cape Spartel, Cape St Vincent and the Siege of Gibraltar.
The HMS Victory sported 104 guns, carried around 850 men and was capable of a top speed of 11 knots. It first set sail in 1765 and was moved to dry dock as a museum piece in 1922. It's still available to visit as well and is technically still in service, making it the world's oldest ship to still be in commission at over 241 years' young.
