Ninth planet of Laoujin, site of the Mother School of the Bene Gesserit.

Wallach IX is a fictional planet in Frank Herbert's saga of science fiction novels Dune. Laoujin's ninth planet, best known for being the headquarters of the Bene Gesserit Mother School.

In the proto-sequel trilogy Legends of Dune, written by Brian Herbert and Kevin J. Anderson, Whallach IX was one of the Synchronized Worlds, and was attacked by the Butlerian Jihad fleet during its systematic atomic destruction of all Worlds. Synchronized. Later, in the original series, Wallach IX is the headquarters of the Bene Gesserit Mother School.