Symbolism and the Interaction of the Real and the Ideal: Scenery in Early-Modern Netherlandish Graphic Art.
In: G. Backhaus and J. Murungi, editors, Symbolic Landscapes, pages 251-264. Dordrecht, 2009.
Anat Gilboa.
[BibTeX] 

Cities of God? Medieval urban forms and their Christian symbolism.
Transactions of the Institute of British Geographers, 29:296-313, 2004.
Keith D. Lilley.
[BibTeX]