The unique position occupied by the Blessed Virgin Mary in the scheme of salvation called for a corresponding recognition from the Church in the development of her festal system. As a matter of fact the Church has amply discharged this duty, inasmuch as not only the events in our Lady’s life recorded in Scripture have been made the occasion of festivals, but others also not mentioned therein. A considerable period, however, elapsed before this work was accomplished. This circumstance has been explained by reference to the fact that the Church, while paganism was still in power, refrained from publicly honouring the parents of our Lord after the flesh, on account of the myths and genealogies current about the gods. More weight may be given to the circumstance that the facts relating to the life of Jesus and the redemption He accomplished had first to be commemorated by fixed festivals before an extension of the Calendar in other directions could be thought of. Then again, in the early ages, it was felt to be an imperative duty to duly honour the commemorations of the numerous martyrs, and the custom of appointing days for the commemoration of saints not martyrs only came into existence later. The cultus paid to the Mother of God by the Church existed long before the institution of her feasts, for Constantine is said to have built three churches in her honour in his new capital. According to recent investigations, a Church dedicated to her, Maria Antiqua,[494] is said to have existed in Rome before the erection of the Liberian basilica, generally reckoned as the oldest Church of our Lady in the Eternal City. It is certain that Ephesus had a noteworthy Church of our Lady in 431, in which the third Ecumenical Council held its meetings.