In Greek mythology, the Cabeiri (Cabiri, Kabeiroi, or Kabiri; Ancient Greek: Κάβειροι) were a group of enigmatic chthonic deities. They were worshiped in a mystery cult closely associated with that of Hephaestus, centered in the north Aegean islands of Lemnos and possibly Samothrace—at the Samothrace temple complex—and at Thebes. In their distant origins the Cabeiri and the Samothracian gods may include pre-Greek elements, or other non-Greek elements, such as Hittite, Thracian, proto-Etruscan or Phrygian. The Lemnian cult was always local to Lemnos, but the Samothracian mystery cult spread rapidly throughout the Greek world during the Hellenistic period, eventually initiating Romans.