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Holy See Holy See

Holy See

States with nuclear-free security strategies

The Holy See has signed and ratified the TPNW and is in compliance with all of the prohibitions in Article 1 of the Treaty.

Latest developments and background

The Holy See has on multiple occasions expressed grave concern over the catastrophic humanitarian and environmental effects of the use of nuclear weapons. In November 2017, Pope Francis maintained that “the possession of nuclear weapons should be firmly condemned." He also said that the existence of nuclear weapons "creates a false sense of security that holds international relations hostage and stifles peaceful coexistence" ( On 26 September 2019, Secretary of State Cardinal Pietro Parolin, said in the UN that the Holy See “acknowledges with satisfaction the increasing number of states who have ratified the Treaty on the Prohibition of Nuclear Weapons and encourages those states who have already signed it to ratify it as soon as possible. We believe that the treaty is an important step towards a nuclear-weapons-free world and complements the NPT.” (


  • 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 into national law.
Yes (20 Sep 2017)
Ratified (20 Sep 2017)
Compliance with article 1(1) of the TPNW
Art 1(1)(a) The prohibition on developing, producing, manufacturing, or otherwise acquiring Compliant
The prohibition on testing Compliant
The prohibition on possessing or stockpiling Compliant
Art 1(1)(b) The prohibition on transferring Compliant
Art 1(1)(c) The prohibition on receiving transfer or control Compliant
Art 1(1)(d) The prohibition on using Compliant
The prohibition on threatening to use Compliant
Art 1(1)(e) The prohibition on assisting prohibited activities Compliant
The prohibition on encouraging or inducing prohibited activities Compliant
Art 1(1)(f) The prohibition on encouraging or inducing prohibited activities Compliant
Art 1(1)(g) The prohibition on allowing stationing, installation, or deployment Compliant
TPNW process
Vote on mandate resolution (A/RES/71/258) N/A
Participated in treaty negotiations (% women) Yes (22%)
Vote on adoption of treaty text Voted yes
Vote on UNGA resolution 2018 N/A
Fissile material
Highly enriched uranium stocks No
Civilian plutonium stocks
Fissile material production No
Related treaties and mechanisms
Party to the NPT Yes
Party to a NWFZ No
Ratified the CTBT Yes
Party to the PTBT No
Member of the CD No (Observer)
IAEA CSA in force Yes
IAEA AP in force Yes
Party to the CWC Yes
Party to the BWC Yes