HMS Euryalus was a Royal Navy 36-gun Apollo-class frigate, which saw service in the Battle of Trafalgar and the War of 1812. During her career she was commanded by three prominent naval personalities of the Napoleonic and post-Napoleonic period, Henry Blackwood, George Dundas and Charles Napier. After the end of the Napoleonic Wars she continued on active service for a number of years, before spending more than two decades as a prison hulk. She ended her career in Gibraltar where, in 1860, she was sold for breaking up.