The History of the Decline and Fall of the Roman Empire

http://en.wikipedia.org/wiki/The_History_of_the_Decline_and_Fall_of_the_Roman_Empire
http://www.amazon.com/Decline-Fall-Roman-Empire-Vol/dp/0809592355
http://www.ccel.org/g/gibbon/decline/home.html
http://www.booksshouldbefree.com/book/the-decline-and-fall-of-the-roman-empire-vol-i-by-edward-gibbon