Verified answer

http://en.wikipedia.org/wiki/Roman_Empire

http://www.roman-empire.net/

http://www.ghg.net/shetler/rome/

Wikipedia, ask Geeves and the everpopular Google. Be specific on the first two and broad on the last and you should get a lot of information about whatever you are searching for...

http://en.wikipedia.org/wiki/Roman_Empire

www.roman-empire.net/ or www.roman-empire.net/children/index.html

They both look good and comprehensive.