The Cover Feature shows a watercolor painting of highly stable copper phosphonate frameworks. These frameworks are created by utilizing a tetrahedral-shaped organic building block called methane tetra-p-phenylphosphonic acid, along with different N-ancillary ligands. The main goal of this study is to optimize the binding modes of the ligands on the copper coordination sphere, resulting in the formation of novel secondary building units (SBUs) in metal organophosphonates. More information can be found in the Research Article by Y. Zorlu, G. Yücesan, and co-workers.