Dionysus, one of the best known deities in the Greek pantheon, has an important role in Greek mythology. There are a number of sources on his birth, and it is evident that he is a very complex deity by his presence in non-Greek peoples, such as Egyptians, Arabs and Scyths, which is why he is often believed to be a non-Greek deity originally. In accordance with this, his cult is also an enigmatic one, from which we can single out the Mysteries as the most intriguing aspect. After a general depiction of Dionysus and his cult, by using original Greek texts (e.g. Euripides' tragedy Bacchae, Diodorus' Library of History, Herodotus' Histories, hymns to Dionysus etc.), as well as modern sources (W. F. Otto, N. Engel, N. Mureddu, B.M. Näsström etc.), there will be focus on the depiction of rituals of the Mysteries, which indicate the connection to life and death, as well as decoding the problem of their origin and meaning.