Theologically, there is only one Church, for Christians are now fellow citizens of the saints and of the household of God, built upon the foundation of the apostles and prophets. . . . This Church is not a human organization; it is God’s workmanship (Eph. 2:10), created in accordance with His eternal purpose in Christ (Eph. 1:4f.) that in it He might show the exceeding riches of His grace (Eph. 2:7).

“Church” by G. W. Bromiley in The International Standard Bible Encyclopedia, Vol. 1, A-D, 693.