DIODORUS, MARIANUS and OTHERS (December 1) (Saints) Martyrs (3rd century) Roman Martyrs under Uumcrian (A.D. 283). They are mentioned in the Acts of Saints Chrysanthus and Darias; but these cannot be trusted for accuracy of detail. The tradition is that they were walled up in the Catacombs and there left to die. A Feast is also kept on January 17 in memory of the finding of their remains (A.D. 886). These Martyrs are described as being very numerous. In fact, it appears to have been a case of a Christian Congregation surprised while assembled for prayer, and disposed of by having the entrance to their subterranean Oratory blocked up.