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Pope Leo XIV speaks to students in the Paul VI Audience Hall at the Vatican Oct. 30, 2025, as part of the Jubilee of the World of Education. (CNS photo/Vatican Media)

Vatican announces theme for World Mission Sunday 2026


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Catholic News Service Filed Under: Missions, News, World News

VATICAN CITY (CNS) — When the Catholic Church celebrates World Mission Sunday for the 100th time in 2026, it will focus on theme, “One in Christ, united in mission.”

The theme, chosen by Pope Leo XIV, is a reflection of his episcopal motto, “In Illo uno unum,” or literally “In the One, we are one.”

The Vatican announced Oct. 31 the theme for the 2026 observance, which will be celebrated Oct. 18. A papal message on the theme is expected in early February.

The theme “highlights the unity of believers in the faith, founded on the unity of Christ with the Father, and the consequent shared mission of evangelization,” the Vatican said.

For World Mission Sunday, Catholics around the globe spend time learning about the Catholic missions, pray in support of missionaries and make donations to support the work of the church in mission lands.

Ahead of the 2025 celebration, Pope Leo had issued a video explaining that “when I served as a missionary priest and then bishop in Peru, I saw first-hand how the faith, the prayer and the generosity shown on World Mission Sunday can transform entire communities.”

As an Augustinian priest, Pope Leo had served in the missions in Peru from 1985 to 1999 and then as apostolic administrator and later bishop of Chiclayo from 2014 to 2023.

Pope Pius XI instituted World Mission Sunday in 1926 to ensure that Catholics around the world shared responsibility for the missionary work of the church.

Pope Leo XIV makes surprise visit to pray for peace at the tomb of St. Benedict

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Pope Leo XIV made a surprise visit to the Benedictine Abbey of Montecassino July 20, where he prayed for peace at the tomb of St. Benedict.

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Ukraine remains hopeful for a papal visit, ambassador says

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Ukrainian President Volodymyr Zelenskyy and his government’s representative to the Holy See are hopeful that Pope Leo XIV will visit Ukraine despite no firm indication from the Vatican that a visit is in the works.

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Pope Leo XIV in Castel Gandolfo: God’s kingdom grows in the ‘little things of daily life’

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Catholics from every inhabited continent gathered in Castel Gandolfo July 19 as Pope Leo XIV led the Angelus prayer from the papal summer palace in the small Italian hill town, where the pope reflected on how the kingdom of God grows through “the little things of daily life.”

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Catholic group helps parishes to share a table with the poor, following pope’s example

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When Pope Leo XIV sat down to lunch with people experiencing homelessness and poverty at Castel Gandolfo this month, he offered a model that one Catholic organization says any parish can follow.

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After Vatican’s excommunication, SSPX in Kenya insists on Catholic identity, fighting archdiocese

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As African bishops continue to back Pope Leo XIV over the excommunication of the Society of St. Pius X, known as SSPX, the traditionalist group in Kenya rejected the schismatic tag as it moved to assure followers of its Roman Catholic identity.

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Pilgrims flock to Castel Gandolfo for Pope Leo’s first summer Angelus

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When the 8:21 a.m. train left Rome’s Termini Station to Castel Gandolfo July 12, people packed like sardines into the regional cars. While two or three passengers got off at stations along the way, most disembarked at Castel Gandolfo and headed up the hill to see Pope Leo XIV during the Sunday Angelus prayer — the first this summer to be said from his lakeview residence.

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