Pax Christi is the international Catholic peace movement born out of the ashes of World War II. It began in the winter of 1944 when a group of people inspired by their faith came together to promote peace and reconciliation between France and Germany.

Pax Christi has national sections in all continents and thousands of members all over the world. It deals with wide ranging issues related to peace and justice in the areas of disarmament and security, human rights, economic justice and development; faith, dialogue, reconciliation, peace building and the integrity of creation. Pax Christi is open to all and works with other peace movements in all areas of peacemaking.

The work of Pax Christi began in 1958 in Ireland. In recent times Pax Christi Ireland has been involved in issues related to landmines, explosive remnants of war, small arms & light weapons, child soldiers, nuclear disarmament and other weapons of mass destruction. It has also been involved with issues related to the Middle East, East Timor, Tibet and Bouganville. It has been engaged in the promotion of peace and reconciliation in Northern Ireland.

Pax Christi has consultative status at the United Nations, UNESCO, UNICEF and the Council of Europe. It is the recipient of the 1983 UNESCO Peace Education Prize and of the 1987 Peace Messenger Award.