At the main entrance to the School of Design in Basel, Hans Arp's untitled 1960 concrete wall transforms a functional architectural element into a profound meditation on form. The work is a perforated barrier that guides movement, yet its defining feature is an oval or teardrop-shaped opening that challenges the very solidity of its material. This opening creates a dynamic interplay between positive and negative space, between the rigid, tectonic structure and an organic, fluid void. The effect is that of a designer's model, playfully isolating and examining pure form within a fixed framework. A second, related work nearby continues this exploration with projecting and receding shapes, their silhouettes echoing Arp's earlier wooden reliefs. Together, they demonstrate how art integrated into a school of design can actively teach the principles of composition, balance, and the dialogue between constraint and creativity to every passing student.