The Servant of God Pietro La Fontaine (29 November 1860 – 9 July 1935) was an Italian Roman Catholic cardinal who served as the Patriarch of Venice from 1915 until his death.
He was also a member of the Roman Curia and held several other positions prior to his elevation to the cardinalate and patriarchate.
La Fontaine remained a simple pastor at heart and was known for his gentleness and his welcoming nature as both a bishop and patriarch.
He was supportive of some aspects of fascism though came to oppose it when he saw it was becoming a totalitarian regime.
La Fontaine was viewed as "papabile" in the 1922 papal conclave that elected Pope Pius XI and was a serious contender for the papal see having garnered a great deal of votes until Cardinal Ratti's selection on the fourteenth ballot.His cause of canonization commenced over three decades after his death and he has been titled as a Servant of God.