The term four mirrors, or "the Four Mirrors," may refer to:
Mirror armour, of Mughal and Mongol "Four Mirrors" ("char-aina") type. Shikyō (Japanese: 四鏡) "Four Mirrors"; four Japanese history books of the Muromachi Period Sijing (Chinese: 四鏡) "Four Lenses"; article in the Huashu with the earliest known reference to the basic types of simple lenses