How does Christine de Pizan use imagery in The Book of the City of Ladies?

Imagery:

"My dear Christine, I mustn't hang back from performing my duty: together we must construct the houses and buildings inside the walls of the City of Ladies which my sister Reason has now put up. Take your tools and come with me. Don't hesitate to mix the mortar well in your inkpot and set to on the masonry work with great strokes of your pen. I'll keep you well supplied with materials. With the grace of God, we'll soon have put up the royal palaces and noble mansions for the glorious and illustrious ladies who will come to live in this city for evermore."