It's doubtful that statutes of Mary existed in 325 AD. There were no references to Mary in the First Council of Nicaea. By the time of the First Council of Nicaea in 325 AD, Christian art was beginning to develop significantly. However, it is important to note that the use of religious imagery was still a contentious issue among early Christians. The church had not yet established a uniform practice regarding the veneration of images or statues. Theological debates about iconography would continue for centuries, culminating in significant controversies such as the Iconoclast Controversy in the Byzantine Empire.
Re: Encyclopedia Britannica & Catholic Online.