The treasures of Paris

Notre-Dame must one of the most visited cathedral on earth, but Paris is filled with treasures, and this is one of them: Notre-Dame-de-Lorette.

It was built between  1826 -1836 and the architect was Louis-Hippolyte Lebas.  The name comes from the ladies (the "lorettes") that lived in this area and made a living to entertain wealthy men.