The Royal Navy's Victoria class (or Sans Pareil class) of the 1880s was the first class of ironclad warship (sometimes described as a battleship) which used triple expansion steam engines, previous classes having used compound engines.
There were only two ships in this class. The lead ship, HMS Victoria, was sunk in an accidental collision with another Royal Navy battleship, HMS Camperdown in the Mediterranean Sea with the loss of half of her crew. Her sister ship, HMS Sans Pareil, survived until she was scrapped in April 1907.