Vatican web site: http://www.vatican.va/phome_en.htm

 

Vatican museums: http://www.roma2000.it/zmusvat.html

 

Vatican pictures: http://www.terragalleria.com/europe/italy/vatican/vatican.html

 

Sistine photos: http://198.62.75.1/www1/sistine/0-Tour.html

 

Vatican observatory:  http://clavius.as.arizona.edu/vo/R1024/VATT.html

 

Ancient Rome: http://myweb.lmu.edu/fjust/Rome.htm

 

Encyclopedia: http://www.encyclopedia.com/html/V/Vatican.asp