The empty throne

[MarcoP]

Three examples where an empty throne is the central focus of the illustration occur in different versions of a book by Christine de Pizan, Le livre du chemin de long estude.

It's part of the "Four queens who rule the world" narrative and its meaning is unclear to me, something religious obviously (descended from the sky): You are not allowed to view links. Register or Login to view.

One of the queens is described as wearing a helm instead of a crown. You are not allowed to view links. Register or Login to view.

The three others could match the 3 queens in the VMS but the one with the helm? I haven't seen anything like it.

You are not allowed to view links. Register or Login to view. the allegory is explained in this terms [google translate]:

After having traveled the Heavens under the leadership of the Sybil, Christine arrives before a tribunal where four queens sit: Wisdom in the East, with an armillary sphere under her feet (top left); Chivalry in the North, overlooking a fortress; Wealth in the East, with tools from builders; Nobility in the South, her feet resting on a king.

EDIT: You are not allowed to view links. Register or Login to view. they say that in the following scene (and illustration) the central throne is occupied by the personification of Reason.