Council of Basel

 SESSION 1 14 December 1431

 SESSION 2 15 February 1432

 SESSION 3 29 April 1432

 SESSION 4 20 June 1432

 SESSION 5 9 August 1432

 SESSION 6 6 September 1432

 SESSION 7 6 November 1432 [Interval for a papal election]

 SESSION 8 18 December 1432

 SESSION 9 22 January 1433

 SESSION 10 19 February 1433

 SESSION 11 27 April 1433

 SESSION 12 13 July 1433

 SESSION 13 11 September 1433

 SESSION 14 7 November 1433

 SESSION 15 26 November 1433

 SESSION 16 5 February 1434

 SESSION 17 26 April 1434

 SESSION 1 8 26 June 1434

 SESSION 19 7 September 1434

 SESSION 20 22 January 1435

 SESSION 21 9 June 1435

 SESSION 22 15 October 1435

 SESSION 23 26 March 1436

 SESSION 24 14 April 1436

 SESSION 25 7 May 1437

 SESSION 1 8 January 1438

 SESSION 2 10 January 1438 [On the legitimate continuation of the council of Ferrara, against the assembly at Basel]

 SESSION 31 15 February 1438

 SESSION 42 9 April 1438

 SESSION 5' 10 January 1439

 SESSION 6 6 July 1439

 SESSION 7 4 September 1439

 SESSION 8 22 November 1439 [Bull of union with the Armenians]

 SESSION 9 23 March 1440

 SESSION 10 27 May 1440

 SESSION 11 4 February 1442

 SESSION 12 14 October 1443

 SESSION 13 30 November 1444

 SESSION 14 7 August 1445

SESSION 42 9 April 1438

[Eugenius IV and the fathers of the council at Ferrara declare the council at Ferrara to be legitimate and ecumenical]

Eugenius, bishop, servant of the servants of God, for an everlasting record. It befits us to render thanks to almighty God who, mindful of his past mercies, always bestows on his church even richer growth and, although he allows her to be tossed on occasions by the waves of trials and tribulations, yet never permits her to be submerged but keeps her safe amid the mountainous waters, so that by his mercy she emerges from the various vicissitudes even stronger than before. For behold, the western and eastern peoples, who have been separated for long, hasten to enter into a pact of harmony and unity; and those who were justly distressed at the long dissension that kept them apart, at last after many centuries, under the impulse of him from whom every good gift comes, meet together in person in this place out of desire for holy union.

We are aware that it is our duty and the duty of the whole church to strain every nerve to ensure that these happy initiatives make progress and have issue through our common care, so that we may deserve to be and to be called co-operators with God.

Finally, our most dear son John Palacologus, emperor of the Romans, together with our venerable brother Joseph, patriarch of Constantinople, the apocrisiaries of the other patriarchal sees and a great multitude of archbishops, ecclesiastics and nobles arrived at their last port, Venice, on 8 February last. There, the said emperor expressly declared, as he had often done before, that for good reasons he could not go to Basel to celebrate the ecumenical or universal council, and he intimated this by a letter to those assembled at Basel. He exhorted and required all of them to go to Ferrara, which had been chosen for the council, to carry through the pious task of this holy union.

We have always had this holy union close to our heart and have sought with all our strength to bring it about. Therefore we intend to carry out with care, as is our duty, the decree of the council of Basel, to which the Greeks agreed, as well as the choice of a place for the ecumenical council, which was made at the council of Basel and which was later confirmed by us at Bologna at the urging of the envoys of the said emperor and patriarch, and any other things pertaining to this work of holy union.

Therefore we decree and declare, in every way and form as best we can, with the assent of the said emperor and patriarch and of all those in the present synod, that there exists a holy universal or ecumenical synod in this city of Ferrara, which is free and safe for all; and therefore it should be deemed and called such a synod by all, in which this holy business of union will be conducted without any quarrelsome contention but with all charity and, as we hope, will be brought by divine favour to a happy conclusion together with the other holy tasks for which the synod is known to have been instituted.