[quote=@Darkspleen]
<Snipped quote by TheSovereignGrave>

Old "enough". =P

Joking aside it'll have been around for quite some time in one form or another. 
[/quote]

Well I imagine Orglas has existed in some form or another since not long after the Calamity, since its position would be pretty prime real estate. Perhaps your faction (or some predecessor of it) has been around since nearly the beginning and aided in its founding. Or maybe they came around later and their knowledge helped the city rise to a state of greater prominence. Or something.