Confraternities of Penitents or Congrèe in Italian, are Roman Catholic religious groups, with bylaws prescribing various penitential works. Beginning in the mid 12th century, a members of these brotherhoods were referred to as converso, Church laymen who had made a "conversion of life" and were affiliated to a monastic order as lay brothers.
Penitents, also called Addolorati, are those who adopted asceticism, of which there are two types. "Natural asceticism" is a lifestyle with lessened material aspects, fasting, refraining from sexual relations without actually entering a monastery. "Unnatural asceticism" includes self infliction of pain or flagellation.
These Penitents lived fairly normal lives, while adhering to rules against blasphemy, gambling, drunkenness, and womanizing. In 1227 Pope Gregory IX recognized his "Brothers and Sisters of Penance". As with today, most penitent confraternities were involved in charitable activity and considered benefactors to both Church and their local communities.
In the past as well as today, the penitent brothers are known for wearing robes and pointed hoods during public processions on Catholic holy days, such as Good Friday, to hide their identities, both for purposes of hiding their sinfulness and providing anonymity for their charitable works. I feel it must be pointed out (unintended pun here), that these are good-hearted, devout Catholics.
Although their pointed caps and white robes (there are other sects throughout Europe with other colors: black, red, blue, etc.) repulse most Americans, the similar garb worn by the extreme racist members of the Ku Klux Klan and these pious Catholic brotherhoods have absolutely nothing in common with each other. The Klan sides with the Devil... the Penitents with God...