The design includes a large, white metal grid meant to suggest scaffolding, to give the building a sense of incompleteness in tune with the architect's deconstructivist tastes.
Ten wooden pews offer a view of the altar, but the nuns are mostly hidden behind a metal grid that they call a grille that separates them from the public.
Originally, this rigid slatted metal grid fitted around key sections of the vehicle was made from heavy steel or aluminium, weighing about 20-30 kg/sqm.