No attempt is made to subordinate the many to the one (the Roman Catholic model), nor the one to the many (the Protestant model). In this view, it is both canonically and theologically correct to speak of the Church and the churches, and vice versa.[12] Historically, that ecclesiological concept was applied in practice as patriarchal pentarchy, embodied in ecclesiastical unity of five major patriarchal thrones (Rome, Constantinople, Alexandria, Antioch and Jerusalem).[13]