Is officially responsible for the maintenance of public buildings and roads, keeping the underground railway running, building new monuments and government offices and stadiums and gallows and whatnot.
Within the Minsitry is the Department of Public Safety, which mainly spends its time planning for and reacting to large fires, floods, riots and so forth. They're responsible for making sure the ruling classes aren't hurt in such incidents.
And within the DPS is the Oddities Office, or "the Double-O". The Double-O is the outfit responsible for recruiting magicians, wizards, shamen and wonderworkers to prevent esoteric troubles getting out of control and to hunt down and kill avatars and cultists.