Paradise Lost by John Milton
Translations of Plato's Republic and The Caterbury Tales by Geoffrey Chaucer.
Chaucer translated The Republic at some point?! I never knew that! (or am I misreading what you've written?)
Some good reading you have there. The Republic is fascinating as a case, even if you disagree with many of its conclusions. Canterbury Tales can be genuinely funny (rare in a historical text) though other parts are a bit duller. Paradise Lost? I'd just advise you to persist with it, even if you occasionally find it hard work. It's worth it.
Sorry, I worded the sentence badly. I meant a translation of the Republic and a translation of The Canterbury Tales by Chaucer.
I've been interested in all three works for some time and have heard good things about all of them. My mother was the one who recommended The Canterbury Tales due to the fact that she learned and read them in the original Middle English.