However, the realisation is not complete until you cross the threshold into St Joseph’s, when the complicity between the concrete poet and master glassmaker Marguerite Huré explodes before your eyes: made entirely of openwork on its eight sides, the lantern tower perfects the liturgical principles thanks to the 12,768 multicoloured hand-blown stained-glass windows which, in a cleverly reinvented religious mysticism, touch the soul of the stunned visitor.