Our contribution to an event pavilion for the anniversary of the city of Karlsruhe in 2015 does not constitute an enclosed interior space. Instead, its ringshaped structure formulates an in-between space that constantly fluctuates between inside and outside.

Papillon and its pivotal point

KA2015. Generation of form

Between closed and open form.

The basic shape of the pavilion is derived from the octagon of Karlsruhe’s palace tower. However, as the pavilion is not at the center of the Karlsruhe circular plan, the underlying octagon is distorted into a seemingly irregular object that responds to external local and internal functional features. The result is an almost animated building, whose fundamentally point-symmetrical arrangement appears asymmetrical and dynamic due to its deformation.

The use of hyperbolic paraboloids (HP surfaces) echoes the convex-concave formal vocabulary of Baroque architecture. The HP surfaces are oriented in such a way that they alternately open and close the pavilion inwards and outwards. They function both as a structural principle as well as for the formation of space.




Karlsruhe, Germany


800 m²


Competition Entry


Holger Hoffmann

Hans-Peter Nünning

Hajdin Dragusha

Eva Hagen

Structural Design

Jürgen Scholte-Wassink