Canada–Holy See relations

Although the Roman Catholic Church has been territorially established in Canada since the founding of New France in the early 16th century, official relations between Canada and the Holy See were only established during the pontificate of Pope Paul VI in 1969. In part, this is because the Holy See had lost its territorial sovereignty over the Papal States during the pontificate of Pope Pius IX and that territorial sovereignty over Vatican City State was only established by the Lateran Treaty of 1929.

Source: Wikipedia — Canada–Holy See relations (CC BY-SA 4.0)