Notre Dame was built from around 1163 to 1290 and parts of the rose windows date from that time. They are a magnificent site as you visit the ancient cathedral and it is amazing to think these have managed to survive so many years. I found a reasonably quiet area and set up for some long exposures of 2-8 seconds, but it was pretty hard to get an unrestricted view with all the visitors passing by. In the end I used a single exposure as the basis for an image and selected several different RAW exposures to use for a HDR image. Light was hitting the vaulted ceiling of the transept from the rose window and from several windows to the left and right of the image, the longish exposure helped burn some of the light into the sand coloured limestone that is used for buildings all over Paris.