Acta Sanctorum (Acts of the Saints) is an encyclopedic text in 68 folio volumes of documents examining the lives of Christian saints, in essence a critical hagiography, which is organised according to each saint's feast day. It begins with two January volumes, published in 1643, and ended with the Propylaeum to December published in 1940. The Acta Sanctorum have from the start been at the forefront of the critical method of scholarship.
The Bollandists, named for the Jesuit scholar Jean Bolland ('Bollandus', 1596–1665), has overseen this mammoth undertaking, first in Antwerp and then in Brussels. When the Jesuits were suppressed by the Habsburg governor of the Low Countries in 1788, the 'Bollandists' continued their work, in the Tongerlo Abbey. From 1643 to 1794, 53 folio volumes of Acta Sanctorum had been published, covering the saints from January 1 to October 14.
After the creation of the Kingdom of Belgium, the Bollandists were permitted to reassemble, working from the Royal Library of Belgium in Brussels.
The many 'Lives of the saints' are essential sources in our knowledge of societies, cultures and civilizations of the Christian world, even secular aspects not directly related to cult or doctrine. A saint is a person of note. The saint exercises an influence on society in civil as well as ecclesiastical affairs. After the saint's death, the communities which the saint has created, institutions he or she has founded, rules drawn up, and even the nature of the cult rendered to the saint, are the raw material of history. As the Society states in defending the usefulness of hagiography in wider contexts,