Not far from Centraal Station is one of the world’s most spectacular church buildings: the futuristic Pauluskerk by Dutch architect Will Alsop. Triangular windows allow light into the inside of this unorthodox, bronze-coloured construction. Specially customised HERTALAN® 3D sleeves were created for this project. To make the window frames wind and water-tight, the sleeves were installed and supplied to the construction site pre-assembled while the frames were being manufactured.