Libellus, book, letter, booklet. So called Christians of the early Church carrying the libelli, supporting documents having sacrificed to the pagan gods and have obeyed the Emperor, certified getting judges for money for not being disturbed. The libelaticos or certificate of apostasy (false) Christians appeared in the middle of the 3rd century the persecution of the Emperor Decio accusing them of being the cause of the plague of antonina and then plague of Cyprian, probably measles.
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