Possible crystal application for FCC and beyond

This article first describes the status and plans for the proposed Future Circular Collider (FCC), and then
surveys possible crystal and channeling applications for the FCC. The latter range from crystal-based positron
production, over crystalline undulators, to crystal collimation. Finally, a long-term perspective is presented,
where, in the far future, crystals or crystal-like structures could enable the construction of ultimate colliders.