Gilboa, Anat ; Backhaus, Gary (Bearb.) ; Murungi, John (Bearb.): Symbolism and the Interaction of the Real and the Ideal: Scenery in Early-Modern Netherlandish Graphic Art In: Symbolic Landscapes. Dordrecht : , 2009, S. 251-264
Lilley, Keith D.: Cities of God? Medieval urban forms and their Christian symbolism. In: Transactions of the Institute of British Geographers, 29 (2004), S. 296-313