Holy orders
The development of positive theology went hand in hand with the progress of research into the Patristic Era and into the history of dogma. These studies were especially cultivated in France and Belgium. A number of scholars, thoroughly versed in history, published in monographs the results of their investigations into the history of particular dogmas. Joannes Morinus (d. 1659) made the Sacrament of Penance the subject of special study; Isaac Habert (d. 1668), the doctrine of the Greek Fathers on grace; Hallier (d. 1659), the Sacrament of Holy orders, Jean Garnier (d. 1681), Pelagianism; Étienne Agard de Champs (d. 1701), Jansenism; Tricassinus (d. 1681), Augustine's doctrine on grace.