If you go to this well-known landmark very early in the morning
when the doors are first opened
(and it is not in the months of March through October),
you can take your time photographing the amazing architecture
and details absent the crowds.
The Cathedral is open every day at 8am
and on Saturdays and Sundays at 7:15am.
Since I did not take my own advice on this particular visit,
you will notice that my photo (and all of the others I took)
are aimed away from the tourists.
Cathédrale Notre Dame de Paris
6 Parvis Notre Dame
Place Jean-Paul II