I have been to friends in Paris. Everyone should not miss the famous Notre Dame de Paris. In fact, on the island of Xitun, about 500 meters away from Notre Dame, there is also a very low-key, little-known Saint Chapel. It used to be the royal chapel of the French royal family. The church has a small footprint but is extremely luxurious. There is no pillar in the middle of the long and narrow hall. The dozen or so tall colored windows around it occupy most of the wall. Each window depicts the story related to the Bible. . Standing in the empty hall, looking up and looking around, as if surrounded by the light of various colors, it is amazing!