The only time I go to a church on Sunday is when I'm visiting one as a tourist. Even though I've visited Paris too many times to count, and lived here now for over a year, I had never gone to Sainte Chapelle until one rainy gray cold morning last month. It is next to the Hall of Justice, so the side by side juxtaposition means entry is strictly controlled by the gendarmes; be prepared for TSA level screening because the entry allows access to both depending on the day of the week.
The Hall of Justice
The entry to Sainte Chapelle is under renovation and has only a small gift shop and this small section open to the public.
Even in the stained glass, the the proximity of "church" and "state" is a theme is played out in both the history of France and in the art in Sainte Chapelle. The stained glass comprises more of the structure than the stone in the building which was finished in a record breaking 6 years time in 1248.
The exterior does not convey the magical light the stained glass gives from within, especially on a gray rainy day.
you reach the main part of the church which looks like this on the outside
but the inside is magically different
Spending time inside this "colorful lantern" has a wonderful magical effect of making the gray skies outside disappear:)