Idir

Homeworld of the tripedal Idiran species and seat of their religious empire. Features planetary infrastructure including vulnerable computer networks. Later occupied.

Idir serves as the sacred homeworld of the tripedal Idirans and the unyielding heart of their sprawling religious empire in Iain M. Banks' Culture series, embodying their martial zeal and technological prowess centered around vulnerable planetary networks. Introduced in Consider Phlebas amid the galaxy-shattering Idiran-Culture War, it stands as a symbol of Idiran defiance until its ultimate occupation by Culture forces, marking the empire's collapse. Though absent in later novels, Idir's legacy lingers as the cradle of a holy war that reshaped the galaxy, its fall underscoring the Culture's inexorable ascendancy.