Cover Picture: The Tungstogermanate [Ce 20 Ge 10 W 100 O 376 (OH) 4 (H 2 O) 30 ] 56− : A Polyoxometalate Containing 20 Cerium(III) Atoms (Angew. Chem. Int. Ed. 32/2007)

A gigantic polyoxometalate … … [Ce 20 Ge 10 W 100 O 376 (OH) 4 (H 2 O) 30 ] 56− ( 1 ) was obtained in a classic one‐pot synthesis from Ce III  ions and the trilacunary precursor [α‐GeW 9 O 34 ] 10− in water, as described by U. Kortz and co‐workers in their Communication on page 6192 ff. The cover picture shows a possible mechanism of formation by stepwise self‐assembly, beginning with the formation of Ce 2 GeW 10 Keggin units, followed by arrangement of five such units into chiral, enantiomeric {Ce 2 GeW 10 } 5 species, and then dimerization of the R and S forms to give 1 .