Pope Paul VI (born Giovanni Battista Enrico Antonio Maria Montini; 26 September 1897 – 6 August 1978) was head of the Catholic Church and sovereign of the Vatican City State from 21 June 1963 until his death on 6 August 1978. Succeeding John XXIII, he continued the Second Vatican Council, which he closed in 1965, implementing its numerous reforms. He fostered improved ecumenical relations with Eastern Orthodox and Protestant churches, which resulted in many historic meetings and agreements. In January 1964, he flew to Jordan, the first time a reigning pontiff had left Italy in more than a century.

Montini served in the Holy See's Secretariat of State from 1922 to 1954, and along with Domenico Tardini was considered the closest and most influential advisor of Pope Pius XII. In 1954, Pius named Montini Archbishop of Milan, the largest Italian diocese. Montini later became the Secretary of the Italian Bishops' Conference. John XXIII elevated Montini to the College of Cardinals in 1958, and after his death, Montini was, with little to no opposition, elected his successor, taking the name Paul VI.

He reconvened the Second Vatican Council, which had been suspended during the interregnum. After its conclusion, Paul VI took charge of the interpretation and implementation of its mandates, finely balancing the conflicting expectations of various Catholic groups. The resulting reforms were among the widest and deepest in the Church's history.

Paul VI spoke repeatedly to Marian conventions and Mariological meetings, visited Marian shrines and issued three Marian encyclicals. Following Ambrose of Milan, he named Mary as the Mother of the Church during the Second Vatican Council. He described himself as a humble servant of a suffering humanity and demanded significant changes from the rich in North America and Europe in favour of the poor in the Third World. His opposition to birth control was published in the 1968 encyclical Humanae vitae.

Pope Benedict XVI, citing his heroic virtue, proclaimed him venerable on 20 December 2012. Pope Francis beatified Paul VI on 19 October 2014, after the recognition of a miracle attributed to his intercession. His liturgical feast was celebrated on the date of his birth, 26 September, until 2019 when it was changed to the date of his priestly ordination, 29 May. Pope Francis canonised him on 14 October 2018. Paul VI is the most recent pope to take the pontifical name "Paul".

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