A. Sire (born 1949) is a Spanish-born British historian, Catholic author and a former Knight of the Sovereign Military Order of Malta.
He has established himself as a traditionalist Catholic, critical of innovations which he considers discordant with the Church's tradition and consistent teaching.
In 2015, Sire published Phoenix from the Ashes: The Making, Unmaking, and Restoration of Catholic Tradition, a highly critical approach to the Second Vatican Council and its effects on the Catholic Church, in which he concludes: "The fact needs to be clearly stated: the Second Vatican Council was a betrayal of the Church's faith.
Sire revealed his authorship in March 2018, one month before the publication of the revised and updated English edition, resulting in his suspension from the Order of Malta.
[4] On November 19, 2018, Fra’ Giacomo Dalla Torre, the Grand Master of the Sovereign Order of the Knights of Malta, issued a decree expelling Sire[2] stating that "the Order of Malta dissociates itself from the positions conveyed and considers the content of the book a grave offence to His Holiness, Pope Francis".