Ecclesia or ekklesia may refer to: Ecclesia (Church), the Christian Church See Church militant and church triumphant for ecclesia militans, ecclesia penitens, ecclesia triumphans Ecclesia (ancient Athens), the principal assembly of ancient Athens during its Golden Age Ecclesia (sociology of religion), in the typology of religion, a religion less pervasive in a society than a church but more so than a sect Ekklesia (think tank), a British think tank examining the role of religion in public l… (More on Ecclesia)