I believe that it's not an issue of timeline, it's an issue of narrative coherence. You don't bring the Clock Tower upper echelons to watch someone like Eric Bloodaxe fight Marie Antoinette; you bring them to watch people like Achilles duke it out with King Arthur.

[s]Wait are the Clock Tower spectators in this RP a loosely-based counterpart of the existing Fate fandom?[/s]

EDIT: Oh hey I got sniped by Turbo. It seems he does live up to his name.