In this thesis, Mary, the Mother of God, will be presented in the teaching and tradition of the Church. The first part of the paper talks about private and public announcements, while emphasizing the purpose of private announcements, i.e. deepening what already exists within public ones, with the aim of deeper understanding of certain articles of faith and returning the emphasis to those things that have been overlooked. Also, this part deals with the evaluation of Christian mysticism and the evaluation of Our Lady's apparitions. In the second part of the paper, we talk about Mary in Christian worship with emphasis on the fact that her image should be incorporated into the complete Revelation, and her worship should be expressed in connection with fundamental religious truths. In the last part of the work, four Marian dogmas are stated and analyzed, that is, Mary Immaculata or Mary Immaculate, Mary Assumpta or Mary Ascended to Heaven, Mary the Virgin and, finally, Mary the Mother of God. Finally, there is a brief description of Marian sanctuaries, and only those where Mary's apparitions are recognized by the Church, and then a description of important church documents related to Mary. The purpose of this work is to point out the importance of Mary's image within the (Catholic) Church and the entire Croatian cultural and religious tradition.