Belief in the Assumption goes back to apostolic era and it is found in the ancient liturgies of the Church. In Rome the Assumption or Dormitio of the Blessed Virgin Mary appears in the 7th century to have been celebrated for an indefinite period of time. St. John Damascene taught it. It was taught by early church fathers and found in the early liturgies of the Church. The Assumption has been proclaimed by popes, taught by bishops, saints, doctors of the church, contained in liturgies, litanies and processions and became universally practiced long before Pius XII solemnized it