The Delian Order is an order of Unknown knights in the service of The Grand Republic of Delios. They're among the oldest knight orders on Tor'Dath with history stretching back hundreds of years and ruins of the old Delian Empire often contain relics of the orders past.
As a branch of the Order of the Sacred Flame the Delian Order takes upon itself to defend newly discovered leylines and ruins from bandits or other non-desirables like The Mages Society