You did it!
Now here's a question for you:
How close do you think the characters in the play are to the historical figures they represent? Maybe Shakespeare presented them one way, but in history they had a very different personality. How historically accurate was Shakespeare?
Here's an example of another webquest that asks students to research that very question: http://www.edu.pe.ca/threeoaks/english/webquests/caesar/webques.htm (lots of good links here if you're interested)
If you're still interested in learning more about Shakespeare vs. History, read this essay: http://glassvisage.hubpages.com/hub/Julius-Caesar---The-Assassination-History-and-Shakespeare-Combined
(note: this is a student essay, and there are some imperfections, but it does have some very good information and ideas)