Quote from : Angel War Book

And so it was that Michael built a brown castle on the peak of his mountain, Gabriel built a golden pyramid in the midst of his plain, saying it was both a holy temple in my praise and an edifice that would guide him on his pattern for his future work, though I knew that only he would ever understand it, to my amusement, and Raphael built a silver palace to sparkle above the trees of his forests, as his home and celestial workshop, and I was well pleased with their work, as ever it was better than what I had hoped for. "That was the First Age, the Archangel Age, long over. I can speak in much detail about each stage in my creation, and my scribes have written all my words on each stage in the books I gave to the angel courts, for study and meditation and for prayer, but such details are for my sons and daughters most interested in them, when they are of an age, with the understanding, to comprehend such things.