Civilizations express their cultural identity through art and architecture, much of which, in ancient civilizations, is of a religious nature. Focusing on religious depictions in art and architecture, one can see that early Christian art is much different from Islamic art and that Christian architecture evolved due to the clash between Christians and Muslims during the Crusades.
"The Clash of Civilizations through Art,"
Reason and Respect: Vol. 4
, Article 10.
Available at: http://docs.rwu.edu/rr/vol4/iss1/10