San Hermenegildo was a 112-gun three-decker ship of the line built at Havanna for the Spanish Navy in 1789 to plans by Romero Landa, one of the eight very large ships of the line of the "Santa Ana" class, also known as "los Meregildos". "San Hermenegildo" served in the Spanish Navy during the French Revolutionary Wars and was destroyed with heavy loss of life during the Second Battle of Algeciras.