In this study we want to present from a theological and missionary point of view, a comparative ecclesiology, the Church attributes, as they have been formulated in the Nicene-Constatinopolitan symbol of faith, as perceived and experienced in Orthodoxy until today and to identify their actual confessional and denominational perceptions. The Orthodox Church is the faith ful guardian of doctrinal and spiritual patristic heritage, is a space of a real sacramentality and deifying communion with the Trinity present in the Church, a partner in the ecumenical dialogue, respecting the choices of Christians disconnected from her orher adversaries, but calling for a critical reflection on true Christian plenary life in Christ and Holy Spirit, for the unity and holiness of men, to be partakers of the kingdom of the world to come, promised an prepared by Christ Himself.