Аннотация:The cover picture shows a magnetic cluster, which was rationally designed by following a two-step synthetic approach (color code: light blue = Cu, orange = Si, gray and white = C, dark blue = N, red = O). The compound, which features ten copper(II) ions in three different coordination environments (trigonal-bipyramidal, square-pyramidal and square-planar), was obtained in crystalline form by self-assembly of four monodentate [Cu(tmpa)(CN)]+ units (tmpa=tris(2-pyridylmethyl)amine) around a preformed hexacopper(II)-siloxanolate cage, [Cu6{(PhSiO2)6}2]. Further details on the synthesis, structure, and magnetic properties are reported