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States Parties

Holy See

The Holy See and Pope Francis have on multiple occasions expressed grave concern over the catastrophic humanitarian and environmental effects of the use of nuclear weapons, and comdemnded the possession of nuclear weapons.

20 Sep 2017
20 Sep 2017 (Ratification)
22 Jan 2021
Received 15 Feb 2021
TPNW Article 1(1) prohibitions: Compliance in 2021
(a) Develop, produce, manufacture, acquire Compliant
Test Compliant
Possess or stockpile Compliant
(b) Transfer Compliant
(c) Receive transfer or control Compliant
(d) Use Compliant
Threaten to use Compliant
(e) Assist, encourage or induce Compliant
(f) Seek or receive assistance Compliant
(g) Allow stationing, installation, deployment Compliant
TPNW voting and participation
2021 UNGA resolution on TPNW
2020 UNGA resolution on TPNW
2019 UNGA resolution on TPNW N/A
2018 UNGA resolution on TPNW N/A
Participated in TPNW negotiations Yes
Share of women in TPNW negotiations 22%
Vote on adoption of treaty text Voted yes
Adoption of TPNW (7 July 2017) Voted yes
IAEA safeguards and fissile material
Safeguards Agreement Yes
TPNW Art 3(2) deadline N/A
Small Quantities Protocol Yes (Modified)
Additional Protocol Yes
Fissile material production facilities No
Highly enriched uranium stocks No
Plutonium stocks (mil/civ) No/No
Related treaties and regimes
Party to the BWC Yes
Party to the CWC Yes
Party to the PTBT No
Ratified the CTBT Yes
Party to the NPT Yes
Party to a NWFZ No
Member of the CD No (Observer)

Latest developments

In the First Committee of the 2021 UN General Assembly, the Holy See welcomed the entry into force of the TPNW as a loud and clear reaffirmation of 'the illegality of these immoral weapons of war'. It added: 'The movement that led to the drafting of the Treaty is itself encouraging and surely represents the aspiration of millions of men and women everywhere for a world free of nuclear weapons. The large number of States that voted in 2017 to adopt the Treaty, as well as the growing number of States that have ratified it, is a positive indicator that one day nuclear weapons will at last be confined to the history books.'1

Also in the First Committe, the Holy See said that the TPNW 'has established a legal prohibition on nuclear weapon possession, and will in due course be a basis for the nuclear-weapon-possessing states to become parties upon eliminating their programs. [...] For now, the current parties to the Treaty can work to develop the procedures that will be necessary for the verification authority or authorities established by the Treaty reliably to assure that the relevant nuclear weapons programs have indeed been eliminated.'2


  • The Holy See should continue to encourage other states to adhere to the TPNW.
  • The Holy See should ensure that all the TPNW obligations are implemented domestically, through legal, administrative, and other necessary measures.
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