Ithaca is a fictional no-ship from the Dune universe created by Frank Herbert. It is a giant spacecraft designed by the Ixians and created in The Scattering for the Honored Matres to serve as a great city in space, a type of space habitat. Miles Teg stole the ship in Gammu, and a decade later the Miles Teg clone-ghola, Duncan Idaho, Sheeana, and Garimi stole it from Murbella, bringing along 150 refugees including the last Tleilaxu Master Scytale, some Bene Gesserit Suk Doctors, male workers from Chapterhouse, the "wild" Reverend Mother Rebecca, the Rabbi, the rest of the surviving members of a cell of Secret Israel, four Futars, and seven small sandworms taken from Chapterhouse.