constructiv PON Rund extends the scope for creativity and planning of the basic system constructiv PON with its trapezoidal connector, which makes structures from polygonal to full circle possible. With constructiv PON Rund constructions ranging from curved and S-shaped to closed rotundas with 24 segments can be built. Since the interior radius always relates to the axis dimensions of the orthogonal basic system, a variety of components can be used for constructiv PON as well as for constructiv PON Rund. Lighting as well as the design of the panels can be oriented towards the inside as well as the outside.