The saint was previously identified as possibly Saint Ignatius of Loyola, but does not resemble portraits of Ignatius
Left and above, allegories of the Holy Trinity, with lettering "Tres sunt qui dant testimonium in terra, et hi tres unum sunt" and "Tres sunt qui dant testimonium in coelo, et hi tres unum sunt", quoting from from John I.7-8, translated in the King James Version as "For there are three that beare record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. And there are three that beare witnesse in earth, the Spirit, and the Water, and the Blood, and these three agree in one". Right, a "vast scaly monster" representing heresy lashes with its trisulcate tongue three creators of heresy: Arius (Arianism), Sabellius (Sabellianism), and Faustus Socinus (Socinianism)