There is biblical evidence that veneration of Mary began during Jesus’ life.
From the NAB version, see Luke 11:27-28
27 8 While he was speaking, a woman from the crowd called out and said to him, “Blessed is the womb that carried you and the breasts at which you nursed.”
28 He (Jesus) replied, “Rather, blessed are those who hear the word of God and observe it.”
Footnote
8, (see vs. 27 above) states :
“8 [27-28] The beatitude in Luke 11:28 should not be interpreted as a rebuke of the mother of Jesus; see the note on Luke 8:21. Rather, it emphasizes (like Luke 2:35) that attentiveness to God’s word is more important than biological relationship to Jesus.”
These verses suggest a very early understanding that this woman, Mary, was (is) indeed very special. From a more modern perspective, it is HER DNA that mixed with the Holy Spirit to create the human being Jesus Christ. Jesus truly carried her genetic material. Does this not make her unique among women?
As the angel Gabriel put it, “Hail, Mary, full of grace.” Later, her friend Elizabeth says “Blessed are you among women and blessed is the fruit of your womb, Jesus.” These statements by Gabriel and Elizabeth are the very initiation of Marian veneration.
Indeed in the above Lukan verses, Christ is merely redirecting the woman who cried out to the understanding of where salvation lies. Therefore - Catholics, as also all of the ancient churches, Worship God and Venerate Mary.
Subrosa