Location from Memory, Sorrow, and Thorn by Tad Williams
The last Sithi tower — impossibly tall, impossibly white, crowned by a bronze angel that watches the east, and hiding in its foundations the place where the Storm King died and the place where he'll try to return.
The tower is the last piece of Asu'a still standing above ground — everything else was destroyed or built over. Its original name was Nightingale Tower, and the angel at its top looks east toward the Garden, though no one alive remembers what that means. It's where Ineluki died — at the top, cursing the mortals, as Asu'a burned around him. And it's where the climax of the trilogy takes place — the three swords brought together, the Storm King's attempted return, the tower's collapse. The angel communicates with Simon through dreams, directing him downward, toward the truth buried in the foundations. Simon and Miriamele carved their names in a door here as children, before either of them knew what the world had planned.
A tower of white stone that thrusts into the sky like a fang, taller than any tree, taller than anything mortals have built. The walls are Sithi-smooth — no mortar joints, no tool marks, as though the stone grew. At the top, a bronze statue of Jenjiyana of the Nightingales, originally burnished copper-gold, now caked in grime and black with weathering. The bell tower has tall arched windows. The stairs climb up into light and descend down into the Sithi ruins below.
Also known as: Green Angel Tower, Nightingale Tower