The Calypso class comprised two steam corvettes (later classified as third-class cruisers) of the Royal Navy. Built for distant cruising in the heyday of the British Empire, they served with the fleet until the early twentieth century, when they became training ships. Remnants of both survive, after a fashion; HMS Calliope in the name of the Naval Reserve unit the ship once served, and HMS Calypso both in the name of a civilian charity and the more corporeal form of the hull, now awash in a cove off Newfoundland.