Lalish, in northern Iraq, is where Yazidis hold the world solidified from its liquid beginning and where Sheikh Adi ibn Musafir's tomb stands. Every Yazidi is expected to make the pilgrimage at least once, entering barefoot and never stepping on a threshold. The seven-day autumn festival there is the community's central gathering, and the fact that the entire faith has one irreplaceable geographic center made displacement after 2014 a religious emergency as well as a humanitarian one.