"Architecture of Italy The Boroque" Google.22 Oct. 2010. http://www.justitaly.org
"Italy Architecture The Gothic Period" Google. 22 Oct. 2010 http://www.justitaly.org
"Italy Architecture The Byzantine" Google. 22 Oct. 2010.http://www.justitaly.org
"Italy Architecture Thr Romanesque Period" Google. 22 Oct. 2010. http://justitaly.org