Michael fortress is the base of operations for the archangel Michael of Apocalypse World on Earth. The fortress is a dilapidated church, located somewhere in the vicinity of Kansas or Nebraska in the Great Barren Plains (formerly known as the Midwest).
After being captured by Michael, Lucifer was placed in a spiked hanging cage in Michael's fortress, where Michael proceeded torture and tap into Lucifer's mind to learn more about Lucifer's home universe.
When Kevin Tran figures out a method to open a rift, Lucifer is brought to the chancel area of the church, where Michael extracts most of his grace to use in the spell to open a rift between the universes. In the blow back of the spell being activated, Lucifer was able to free himself from his guards and jump head first through the rift, closing it behind him, angering Michael and demanding Kevin "fix" it.
- Michael's fortress was originally scripted to be a concrete bunker in the desert. When production designer Jerry Wanek was given free reign to build the set, he opted for a dilapidated church look for the fortress.