Have you done any research concerning colour, Highelf? All of the reconstructions I could find were indeed brightly white, but most reconstructions of Roman era buildings are flat out wrong; the ancients loved to paint something whenever they could and they had quite a gaudy taste in art. I have no idea what the Colosseum…
I did use a lot of reconstruction pictures for refs, but it's not like 1000,000% historically accurate or anything. I used the real thing as a base (mine has the same ammount of arches and whatnot) but I did take quite a bit of artistic liberty in colours and other designs. I chose the whiteness simply because I love that…