Vatican I

 SESSION 1 : 8 December 1869

 Decree of opening of the council

 SESSION 2 : 6 January 1870

 Profession of faith

 SESSION 3 : 24 April 1870

 Dogmatic constitution on the catholic faith

 Chapter 1 On God the creator of all things

 Chapter 2 On revelation

 Chapter 3 On faith

 Chapter 4. On faith and reason

 CANONS

 1. On God the creator of all things

 2. On revelation

 3. On faith

 1. If anyone says that in divine revelation there are contained no true mysteries properly so-called, but that all the dogmas of the faith can be unde

 SESSION 4 : 18 July 1870

 First dogmatic constitution on the church of Christ

 Chapter 1 On the institution of the apostolic primacy in blessed Peter

 Chapter 2. On the permanence of the primacy of blessed Peter in the Roman pontiffs

 Chapter 3. On the power and character of the primacy of the Roman pontiff

 Chapter 4. On the infallible teaching authority of the Roman pontiff

Decree of opening of the council

Pius, bishop, servant of the servants of God, with the approval of the sacred council, for an everlasting record. Most reverend fathers, is it your pleasure that, to the praise and glory of the holy and undivided Trinity, Father, Son and holy Spirit, for the increase and exaltation of the catholic faith and religion, for the uprooting of current errors, for the reformation of the clergy and the christian people, and for the common peace and concord of all, the holy ecumenical Vatican council should be opened, and be declared to have been opened?

[They replied: Yes]

Pius, bishop, servant of the servants of God, with the approval of the sacred council, for an everlasting record. Most reverend fathers, is it your pleasure that the next session of the holy ecumenical Vatican council should be held on the feast of the Epiphany of the Lord, that is 6 January 1870?

[They replied: Yes]