Cesari, Jocelyne, Mosque Conflicts in European Cities: Introduction, in: Journal of ethnic and migration studies: JEMS, vol. 31, no. 6, Abingdon 2005, p.1025-1043.

Gerhards, Albert, Spaces for Active Participation. Theological and Liturgical Perspectives on Catholic Church Architecture, in: Stock, Wolfgang Jean, European church architecture 1950 – 2000,  München 2003.

Gerhards, Albert, The Relevance of Avantgarde. Catholic Liturgy and Church Architecture from 1900 to 1950, in: Stock, Wolfgang Jean, European church architecture 1900 - 1950,  München 2006.

Sachs, Angeli, Voolen, Edward van (eds.), Jewish Identity in Contemporary Architecture, Berlin London New York 2004.

Schwebel, Horst, The Liturgy as a Client. Changes in ProtestantChurch Architecture between 1900 and 1950, in: Stock, Wolfgang Jean, European church architecture 1900 - 1950,  München 2006.

Schwebel, Horst, An Aversion to Grand Gestures. Theological and Liturgical Perspectives on Protestant Church Architecture, in: Stock, Wolfgang Jean, European church architecture 1950 – 2000,  München 2003.

Stirrat R. L., Sacred Models, in: Man, New Series, Vol. 19, No. 2, (Jun., 1984), pp. 199-215 Published by: Royal Anthropological Institute of Great Britain and Ireland.

Built of Living Stones: Art, Architecture, and Worship
Guidelines of the United States Conference of Catholic Bishops
(More about the institution: http://www.usccb.org/whoweare.shtml)
Issued by NCCB/USCC (Now USCCB), November 16, 2000.
Copyright © 2000, United States Conference of Catholic Bishops, Inc.
http://www.usccb.org/liturgy/livingstones.shtml#preface

Religion and politics - A revived area of conflict
Thomas Meyer, Friedrich-Ebert-Stiftung, Berlin 2007
http://library.fes.de/pdf-files/iez/04874.pdf

Europe and Islam: No Securitization, Please!,
Gündüz, Zuhal Yesilyurt International Policy Analysis, Friedrich Eberet Stiftung 2007.
http://library.fes.de/pdf-files/id/04966.pdf

Information on Cologne Cathedral
http://www.koelner-dom.de/
http://www.greatbuildings.com/cgi-bin/glk?http://www.unesco.org/whc/sites/3.htm

Website of Kolumba Museum Cologne
http://www.kolumba.de/

Information on Bonn Minister
http://www.bonner-muenster.de/basilika/index_engl.htm

Information on Aachen Cathedral
http://www.greatbuildings.com/buildings/Aachen_Cathedral.html
http://whc.unesco.org/en/list/3/video

Online information and news coverage about Cologne Mosque project
Wikipedia: http://en.wikipedia.org/wiki/Cologne_Mosque_project
Deutsche Welle: http://www.dw-world.de/dw/article/0,2144,2570710,00.html
International Herald Tribune: http://www.iht.com/articles/2007/07/06/opinion/edcologne.php
British Telegraph: http://www.telegraph.co.uk/news/worldnews/1555604/Huge-mosque-stirs-protests-in-Cologne.html
Islam Today: http://www.islamtoday.com/showme2.cfm?cat_id=38&sub_cat_id=1173
The Economist online: http://www.economist.com/world/international/displaystory.cfm?story_id=9725332
Spiegel_online_international: http://www.spiegel.de/international/germany/0,1518,489257,00.html
Reuters UK: http://uk.reuters.com/article/reutersEdge/idUKNOA52997720070705

Site of Paul Böhm, the architect of the planned mosque in Cologne
http://www.boehmarchitektur.de/

Theomag Heft Thema “Religöse Räume”
http://www.theomag.de/54/index.htm (german)