In 553, the Council of Constantinople, the fifth ecumenical council, anathematized Theodore of Mopsuestia, and also condemned several writings of Theodoret of Cyrus and Ibas of Edessa (see: Three-Chapter Controversy). Since those three theologians were highly regarded among Eastern Syriac Christians, further rifts were created, culminating in 612, when a major council of the Church of the East was held in Seleucia-Ctesiphon. Presided by Babai the Great (d. 628), the council officially adopted specific Christological formulations, using Syriac term "qnoma" (ܩܢܘܡܐ) as designation for dual (divine and human) properties within one prosopon (person) of Christ.