These large doors, using miraculous hydraulics, opened to those
who knew how to light the consecration fire.
The mechanism disappeared toward the end of the 16th century.
This is the famous Diana of Ephesus. A Diana "multi mamia", a Mother Goddess, symbolic of this quest for knowledge which is the ultimate goal of any Renaissance prince.
Here is Diana of Ephesus in this gift of herself and who, with her multiple breasts, distributes the milk of Universal Wisdom.