It represents four Saints: St. John the Evangelist with palm and book; St. John the Baptist with the lamb in a disk; St. Catherine with palm and wheel; St. Margaret issuing from the back of the dragon.
"The Virgin, seated at the entrance to a classical structure, presents the Christ Child to the three magi, St. Margaret and a kneeling nun; behind them, cavaliers gather outside a small village set within a hilly landscape." -Victoria & Albert Museum
"Finger-ring; gold; engraved; enamelled; hoop is wreathed, pearled and ridged; flowers and rays on shoulders; ridged bezel depicting St Margaret holding long cross and standing on dragon on one face, St Catherine on other." -British Museum
"This work is remarkable for the contrast of the idealism and delicacy of the figure set against the scaly and coarse textures of the lizard-turned-dragon at the base of the composition." -Met