This ancient church in the Champagne region of France was consecrated by Pope Leon X in 1049. It was heavily damaged during World War I, but was painstakingly restored. It is heavy, plain, and midaeval, unlike the nearby Notre-dame Basilica which is gothic and very embellished.
It was very quiet the day I visited. In fact, I was the only person there. I walked around the interior for about 30 minutes, quietly setting up my tripod and taking photographs, and not once was I disturbed by anyone.