Petrosomatoglyphs are naturally-occurring or man-made representations of human or animal body parts that are found incised(彫った、刻み込んだ)in rock. Footprints are the most common form of petrosomatoglyph. The ancient images, some of which date back to megalithic(巨石文化の)times, were once considered important symbols and were used in both religious and secular ceremonies. Throughout history, these imprints have been attributed to numerous figures, including the devil, Jesus, the prophet Mohammed, legendary king etc.