Ubiquitous on the landscape of contemporary Mongolia, Buryatia, Inner Mongolia, and Eastern Tibet/Qinghai, structures of stones or trees covered with scarves, skulls, steering wheel covers, and a staggering array of other objects known as ovoo have long marked sites where ritual, though often highly spontaneous, practices invoke the presence of immanent relations. Built and maintained by various publics, gatherings at ovoo have over past centuries been major sites of political action, where the identities of and relationships between more and less local shamans, lamas, imperial officials,...