The radiant-style sainte-chapelle's primary intended effect is to

I believe the correct answer is: to transport visitors into a realm of heavenly beauty.

The radiant-style Sainte-Chapelle's, a royal chapel in the Gothic style, within the medieval Palais de la Cité, the residence of the Kings of France, was primary intended effect is to transport visitors into a realm of heavenly beauty with its increasingly flamboyant patterns of repeated traceries and ornament.