Catoptromancy is one of the oldest and most fascinating forms of divination: the practice of seeking visions, signs, or hidden knowledge through reflective surfaces-especially mirrors. From the Greek katoptron (mirror) and manteia (divination), it is a branch of scrying, alongside crystal and water divination. Used in Ancient Egypt, Greece, Rome, and many other cultures, mirrors were seen as portals between worlds. Priests, oracles, and mystics gazed into polished metal, obsi