Incollection (rahel2008papst)
Oesterle, J. R.
Drews, W. & Oesterle, J. R. (ed.)
Papst – Kalif – König. Vergleiche sakraler Herrschaftsformen im Spiegel islamischer und christlicher Quellen des Mittelalters und moderner Forschung
2008, 57-72

Article (LILLEY)
Lilley, K. D.
Cities of God? Medieval urban forms and their Christian symbolism
Transactions of the Institute of British Geographers, 2004, 29, 296-313

Incollection (khnel1987earthly)
Kühnel, B.
From the Earthly to the Heavenly Jerusalem. Representation of the Holy City in Christian Art of the First Millennium
1987, 34-38, 138-167, 174-177, 220-265, 275-279