Before becoming a Renaissance architectural gem, Saint-Nizier church underwent significant changes over the centuries. Here, the stages of the construction of the church since antiquity can be uncovered like the pieces of a jigsaw which can be gradually fitted together. Thus the temple dedicated to the god Attis in the Gallo-Roman era, becomes the basilica which housed the relics of the Lyon martyrs executed in 177. History then gives way to dream as the building flies away like a castle in the sky in a final metamorphosis, before disintegrating and disappearing in a flash of light. The artists draw their inspiration for this metamorphosis from the graphic world of the Japonese Hayao Miyazaki.