Christianae may refer to:
Christianae Religionis Institutio is John Calvin's seminal work on Protestant systematic theology. Christianae Reipublicae is an encyclical of Pope Clement XIII of 1766 on the dangers of anti-Christian writings. Disputationes de Controversiis Christianae Fidei adversus hujus temporis Haereticos is a work on dogmatics by Robert Bellarmine. Sapientiae Christianae is an 1890 encyclical of Pope Leo XIII. Sodalitium Christianae Vitae is a Society of Apostolic Life founded by Luis Fernando Figari in 1971. Vigiliae Christianae is a review of early Christian life and language.