A novel family of chiral, discrete, nanoscale-sized supramolecular cages are prepared, via self-assembly and noncovalent interactions from the tridentate ligand 1,3,5-tris[(4-pyridyl)ethynyl]benzene and [(R)-(+)-BINAP]Pd-II and -Pt-II bis(triflates). The cationic parts of these highly symmetrical species possess large three-dimensional cavities and are rare examples of molecules with T symmetry.