Marcel Lefebvre and Castro Mayer: The Story of Their Joint Activism at the Second Vatican Council

Marcel Lefebvre and Castro Mayer emerged as leaders of an organized conservative minority during the Second Vatican Council from 1962 to 1965.

While the Council is frequently associated with reformist figures such as Cardinals Augustin Bea, Léon-Joseph Suenens, and Julius Döpfner, as well as theologians Yves Congar and Karl Rahner, Lefebvre and Castro Mayer worked to defend specific doctrinal and liturgical traditions.