During the first millennium of Christian presence in Ethiopia (from the fourth century), church architecture was first in accordance with, and later partially based on, the basilica plan. Circa the early sixteenth century, a new and unique church plan appeared, circular, concentric, and with a square sanctuary, and became the dominant church plan in the northwestern Ethiopian Highlands. This church plan has been referred to in scholarship as an innovation, and its sources of inspiration have not yet been definitively established. In this article, I will argue that this plan is a culmination of a process with roots in the Late Antique and Medieval Holy Land, by which the concentric prayer house plan came to be associated with the Jerusalem Temple. This process transcended religious boundaries and is expressed in the religious architecture of three monotheistic religious traditions.