The oldest commissioned warship afloat in the world is the USS Constitution. What older vessel is the oldest commissioned warship in the world?

HMS Victory was launched in 1765, commissioned in 1778 and is best known as Lord Horatio Nelson's flagship at the Battle of Trafalgar in 1805. As a commissioned warship she is 19 years older than USS Constitution. HMS Victory is preserved in dry dock in Portsmouth, England. USS Constitution was commissioned in 1797 and is berthed near Boston, MA. Both of these historic ships are still commissioned in their respective navies. HMS Surprise is the fictitious ship of author Patrick O'Brian's Captain Jack Aubrey. USS Olympia, launched in 1892, is a comparative youngster among old warships. She was the flagship of Admiral Dewey at the Battle of Manila Bay in the Spanish American War, and is the only surviving ship from that war. She is no longer in commission but is preserved at the Independence Seaport Museum in Philadelphia, PA.