Dominique de Colonia (1660-1741) was a Jesuit and a passionate anti-Jansenist, who spotted Jansenist tendencies in a number of texts of highly esteemed religious writers. This work was itself controversial, and was put on the Index Librorum Prohibitorum, where it remained until at least 1900, when Pope Leo XIII's Index did not list it. Jansenism was a branch of French Catholic thought that grew out of the Counter-Reformation. Originating in the writings of Cornelius Jansen (1585-1638), it stressed original sin, the necessity for divine grace, and asceticism. It was the most divisive force in the Catholic Church between the time of Jansen and the French Revolution, though today it is seen as a modernizing influence. This book was reprinted in 1731, 1735,1739, and 1744, and expanded by Patouillet in 1752 and 1755, but this first edition is uncommon. OCLC lists copies at UCLA, the University of Arizona, Yale, the Library of Congress, Strasboug, and Utrecht.