Bau-Bau or Bau-bau (Indonesian:Kota Bau-bau) is the main city on Buton island, Indonesia. Bau-Bau reached the city status on 21 June 2001, based on the Indonesian law number 13, year 2001. A port called Murhum serves the city sea transportation with a ferry terminal (jetty) operated by the Indonesian state-owned sealiner, Pelni.