ROME (AP) — Traditionalist Catholics celebrated news Monday that the Vatican under Pope Leo XIV had given them permission to celebrate the old Latin Mass in St. Peter’s Basilica during their upcoming pilgrimage.

U.S. Cardinal Raymond Burke, a figurehead of the conservative and traditionalist wing of the church, will celebrate the Mass on Oct. 25, the pilgrimage organizers said.

The development was significant, given Pope Francis had alienated many traditionalists and conservatives with his yearslong crackdown on the ancient liturgy. His reform greatly restricted its celebration globally and at the Vatican, and fueled conservative opposition to his pontificate.

Burke, who became a high-profile critic of Francis, has met at least twice with Leo in formal audiences, most recently on Aug. 22. Burke was believed to be a key behind-the-scenes player rallying conservative votes in the May conclave that elected the former Cardinal Robert Prevost pope.

Leo has said his aim is unity and reconciliation in the church, and many conservatives and traditionalists have urged him to heal the liturgical divisions that spread over the Latin Mass, especially in the United States, during Francis’ 12-year papacy.