Ycocedron Planus Vacuus

This wooden model is part of DAHIMO’s “Il Sogno di Leonardo” series, dedicated to the physical reconstruction of the polyhedra drawn by Leonardo da Vinci for Luca Pacioli’s De Divina Proportione. It is made from 4 mm birch plywood, cleanly laser-cut. The triangular faces are assembled using PVA glue (not included), while the connectors hold the structure by pressure; glue is recommended for added rigidity.

The kit includes 60 triangle segments and 60 connectors, for a total of 120 pieces. The assembly requires attention, but it is intuitive: as the model grows, the structure takes shape, revealing a light, well-balanced geometric form. Building it is a calm and satisfying process.

The model represents a skeletal variant of the icosahedron, one of the five Platonic solids. In this Renaissance-style interpretation, each triangular face is represented only by its edges, following Leonardo’s illustrative approach in Pacioli’s treatise. The result is a ‘planus’ and ‘vacuus’ figure without surfaces, yet rich in structure, lightness, and symmetry.

Once completed, the Ycocedron Planus Vacuus becomes a small mathematical sculpture with striking visual presence. Ideal for display on a desk, in a study, classroom, or museum case, it is one of the most appreciated models in bookshops thanks to its refined simplicity