The fourth Lateran council (twelfth ecumenical), convened by Pope Innocent III.
The fifth Lateran council (eighteenth ecumenical) was convened by Pope Julius II.
The council was generally received as ecumenical, even by the Antiochenes, and the differences between Cyril and John were adjusted (433) by a "Union Creed," which, however, did not prevent a recrudescence of theological controversy.
A compromise was arranged by Sigismund, who had been crowned emperor at Rome on the 31st of May 1433, by which the pope recalled the bull of dissolution, and, reserving the rights of the Holy See, acknowledged the council as ecumenical (15th of December 1 433).
The council declared that it was canonically convened, ecumenical, and representative of the whole Catholic Church; then proceeded immediately to the trial and deposition of Benedict XIII.