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The cosmic microwave background (CMB) anisotropies in spherical 3-spaces witha non-trivial topology are studied. This paper discusses the special class ofthe so-called double-action manifolds, which are for the first time analysedwith respect to their CMB anisotropies. The CMB anisotropies are computed forall prism double-action manifolds generated by a binary dihedral and a cyclicgroup with a group order of up to 180 leading to 33 different topologies.Several spaces are found which show a suppression of the CMB anisotropies onlarge angular distances as it is found on the real CMB sky. It turns out thattwo of these spaces possess Dirichlet domains which are not very far fromhighly symmetric polyhedra like Platonic or Archimedean ones.

Cosmic Topology of Prism Double-Action Manifolds