The Optare Olympus (introduced in 2006 as the East Lancs Olympus, and sold as the Darwen Olympus between 2007 and 2008) is a double-decker bus built by Optare. It could be built as a body available on Alexander Dennis Enviro400, Volvo B9TL or Scania N230UD/N270UD chassis with the 2-axle and 3-axle variants. It is the double-decker equivalent of the Optare Esteem. Some 3-axle Olympus buses were built.