What is the importance of the Illuminati Safe House in the novel, Unmarked?

The Illuminati safe house is where nearly two thirds of the book takes place. This safe house contains the ‘sanctuary’ a place to hold Andras to kill him. The safe house is located in Boston and is vast. There are several different layers to the safe house; a mech room, Athenaeum, meeting rooms, bedrooms, and many more important rooms. The safe house is where the book starts off in chapter one with Kennedy standing outside of Jared’s cell. Furthermore the safe house is where Alex Waters shows up to help contain Andras for the second time and where Bastiel, another demon, is summoned.