The first rapprochement between the Catholic Church and the Oriental Orthodox Churches came about by some common declarations:
COMMON DECLARATIONS

• May 12, 1970 – Rome
  Pope Paul VI and Vasken I, Supreme Catholicos-Patriarch of All Armenians
• October 27, 1971 – Rome
  Pope Paul VI and His Holiness Patriarch Mar Ignatius Jacob III of the Syrian Orthodox Church
• May 10, 1973 – Rome
  Pope Paul VI and Shenouda III, Pope of Alexandria and patriarch of the See of St. Mark
• June 23, 1984 – Rome
  Pope John Paul II and His Holiness Mar Ignatius Zakka I Iwas
• December 13, 1996 – Rome
  Pope John Paul II and Catholicos and Supreme Patriarch of All Armenians Karekin I
• January 25, 1997 – Rome
  Pope John Paul II and Catholicos of Cilicia Aram I Keshishian
• September 27, 2001 – Etchmiadzin, Armenia
  Pope John Paul II and Supreme Patriarch of All Armenians Karekin II
• April 28, 2017 – Cairo, Egypt
  Pope Francis and His Holiness Tawadros II

FIRST SERIES (2003-)

Preparatory Committee for the establishment of a Dialogue Commission involving representatives of the Catholic Church and the Oriental Orthodox Churches – Rome, January 27-29, 2003 – PRESS RELEASE

MEETINGS

1. January 27-30, 2004 – Cairo, Egypt
   “Review of the studies and activities over the past 30 years; planning for the second meeting” – REPORT
2. January 26-29, 2005 – Rome, Italy
   “Understanding of communion, constitutive elements of communion; Particular and universal communion, meaning of sister churches and of Church families; Full communion and degrees of communion, common ecumenical goal” – REPORT
3. January 27-30,2006 – Etchmiadzin, Armenia
   “Bishops in apostolic succession; Primacy and synodality/conciliarity; Synods, local and ecumenical (their ecclesiological meaning); appointment of a drafting committee” – REPORT
4. January 28 – February 3, 2007 – Rome, Italy
   January 29-30 – Oriental Orthodox delegates met
   January 30 – Catholic delegates met

   Joint commission met January 31 – February 2
   “Mission, witness, service and problem of proselytism; salvation of non-believers; marriage between Catholics and Muslims; Mixed marriage with non-believers” – REPORT

   May 28-30, 2007 – Rome, Italy
   Sub-committee drafting meeting

5. January 27 – February 2, 2008 – Maarrat Saydnaya, Syria
   January 27-28 – Delegations met separately

   Joint commission met January 29 – February 2
   “Study of draft document; Goals of the dialogue” – REPORT

   Drafting sub-committee June 25-26, 2008 – Rome, Italy

6. January 26-30, 2009 – Rome, Italy
   January 26 – Delegations met separately

   Joint commission met January 27-30
   “Nature of the communion of our churches shared in the first half of the first millennium” – REPORT and COMMON DOCUMENT

7. January 27-31, 2010 – Antelias, Lebanon
   January 27 – Delegations met separately

   Joint commission met January 28-30
   “The ways in which the churches expressed their communion with one another in the first five centuries; The reception of councils; Approval of agreed statement ‘Nature, Constitution and Mission of the Church’” – REPORT

8. January 25-28, 2011 – Rome, Italy
   January 25 – Delegations met separately

   Joint commission met January 26-28
   “Communion and communication among the churches until mid-fifth century; Role of monasticism; Petrine ministry” – REPORT

9. January 17-21, 2012 – Addis Ababa, Ethiopia
   January 17 – Delegations met separately

   Joint commission met January 18-21
   “Martyrdom and communion; Ecclesial communion in the New Testament; Prayer and liturgy as means of communion and communication” – REPORT

10. January 23-27, 2013 – Rome, Italy
    January 23 (morning) – Delegations met separately

    Joint commission met January 23-26
    “The ways in which full communion among our churches was expressed in the first five centuries; Saints as elements of communion and communication; Processes of canonization and mutual recognition of saints as a constitutive element of communion” – REPORT

11. January 28-February 1, 2014 – Pampakuda, India
    January 28 – Delegations met separately

    Joint commission met January 29-February 1
    “Full communion in the first five centuries; Development of Eucharistic anaphoras; Significance of pilgrimage” – REPORT

12. January 24-31, 2015 – Rome, Italy
    January 26 – Delegations met separately

    Joint commission met January 27-30
    “Approval of ‘The Exercise of Communion in the Life of the Early Church and its Implications for our Search for Communion Today’; Sacraments of initiation” – REPORT and COMMON STATEMENT

13. January 30-February 6, 2016 – Cairo, Egypt
    February 1 – Delegations met separately

    Joint commission met February 2-5
    “The Sacraments of Initiation” – REPORT

14. January 22-27, 2017 – Rome, Italy
    January 22 and 23 – Delegations met separately

    Joint commission met January 24-27
    “The historical, theological, and ecclesiological aspects of the Holy Eucharist; discussion of modern pastoral issues, touching upon communities in diaspora, the challenges of secularism, reaching the younger generation, and the possibility of pastoral adaptation of traditional liturgies” – REPORT

15. January 29 – February 5, 2018 – Etchmiadzin, Armenia
    January 30 – Delegations met separately
    “Consideration of the sacraments with special emphasis on Penance/Reconciliation, Anointing of the Sick, and Holy Orders” – REPORT
16. January 27 – February 2, 2019 – Rome, Italy
    January 28 and 31 – Delegations met separately
    “Consideration of the sacraments with special emphasis on Marriage” – REPORT
17. January 26 – February 1, 2020 – Atchaneh, Lebanon
    January 27 and 29 – Delegations met separately
    “Focus on the fundamental aspects of sacramental theology, including the question of who ministers the sacrament, who can receive a sacrament, and other canonical issues related to matrimony” – REPORT

    January 24-30, 2021 – Rome, Italy – cancelled

18. January 26-28, 2022 – online
    “Study of a draft document on the sacraments in the life of the Church, concluding the third phase of the dialogue” – REPORT
19. June 20-24, 2022 – Rome, Italy
    “Finalization of the document on the sacraments; the main theme of the meeting will be ‘The Virgin Mary in the teaching and life of the Church’”

CO-CHAIRS

H.E. Cardinal Walter Kasper, President, Pontifical Council for Promoting Christian Unity – Vatican City (2003-2010)
H.E. Cardinal Kurt Koch, President, Pontifical Council for Promoting Christian Unity – Vatican City (2011-)
H.E. Anba Bishoy Coptic Orthodox Church – Egypt (2003-2018)

CO-SECRETARIES

Msgr. Johan Bonny, Pontifical Council for Promoting Christian Unity (2003-2008)
Msgr. Gabriel Quicke, Pontifical Council for Promoting Christian Unity (2009-2018)
Rev. Father Hyacinthe Destivelle, OP, Pontifical Council for Promoting Christian Unity (2019-)
Rev. Dr. John Mathews, Secretary, Committee on Inter-Church Relations (2003-2010) (later as bishop Metropolitan Youhanon Mar Demetrios, Assistant Bishop of Delhi) (2011-)