The mysteries of Isis were religious initiation rites performed in the cult of the Egyptian goddess Isis in the Greco-Roman world. They were modeled on other mystery rites, particularly the Eleusinian
A ceremony worshipping the sarcophagus of Osiris, depicted in a fresco in the Temple of Isis at Pompeii from the first century CE. The death of Osiris was a prominent motif in the cult of Isis. The sarcophagus's appearance here may refer to the emphasis on Osiris and the afterlife found in the mysteries dedicated to Isis.
Roman statue of Isis, second century CE
Priestess of Isis holding a situla (bronze jug) or a cista (ritual basket), second century CE
Remains of a temple of Isis on the shore at Cenchreae, Corinth, Greece
Many cultures practice or have practiced initiation rites, including the ancient Greeks, the Hebraic/Jewish, the Babylonian, the Mayan, and the Norse cultures. The modern Japanese practice of Miyamair
A young Buddhist monk takes his vows at Wat Yannawa in Bangkok (2016)