Beautiful statues of the four virtues Episteme (Know?άedge), Sophia (Wisdom), Ennoia (Thought), and Arete (Valour) adorn the niches between the columns.
Episteme, Sophia, Ennoia, and Arete are the names of the four virtues.
Teams of Italian, French, Flemish, and German architects and sculptors contributed to this astonishing cathedral, begun in 1386 by the ruling Visconti family.