Among the shops and cafes, the Old Quarter hides deeply sacred spaces. The most significant is the Bach Ma Temple, or the White Horse Temple, located on Hang Buom Street. This is the oldest temple in the city, and it is dedicated to the guardian spirit of the East—one of the four sacred protectors of Hanoi. Legend says that in the year 1010, when King Ly Thai To was struggling to build the city walls because the soil kept collapsing, a mysterious white horse emerged from the temple. It galloped along a specific path, leaving its hoofprints in the mud. The King ordered the walls to be built following those tracks, and they never collapsed again. Inside, you can still see a beautiful red-lacquered statue of the horse. When visiting, remember to dress respectfully by covering your shoulders and knees, as this remains an active place of worship for locals seeking peace and good fortune.