In the famous dialogue of Minucius Felix, _circa_ A.D. 160, the speakers belong to the higher ranks; these under thinly disguised names were probably actual personages well known in their day. The scene and story of the writing, the class of argument brought forward, all evidently issued from and were addressed to a highly cultured circle. In the writings of Justin Martyr, dating from about the middle of the second century, are various references to the presence of wealthy and cultured persons in the Christian congregation of Rome. Clement of Alexandria and Tertullian, whose pictures of Christian life belong to the latter years of the second century, bear ample testimony to the same fact. Clement even wrote a special treatise entitled, _What rich man can be saved?_ in which he refers not to pagans whose conversion to Christianity was to be aimed at, but to those who were Christians and at the same time wealthy.[58] Tertullian again and again refers to the presence of the rich and the noble in the Christian Churches, in such passages where he speaks of thousands of every age and rank among the brethren--of officials of the Empire, of officers of the imperial household, of lawyers, and even of men of senatorial rank. In his passionate appeals, too, he singles out fashionable ladies, and dwells on their costly dress and jewels. But the most striking proof of the presence of many high-born and wealthy members of the Christian Brotherhood in this congregation dating from primitive times, after all exists in that wonderful City of the Dead beneath the suburbs of Rome which is now being explored. These Roman catacombs, as they are termed, in the large majority of cases in the first instance began in the villa gardens of the rich, and were, as time went on, enlarged by their owners in order to offer the hospitality of the tomb to their poorer brothers and sisters. As we shall see in our chapter dealing with these all-important memories of early Roman Christianity, as cemetery after cemetery is examined we come upon more and more relics in marble and stone which tell of great and powerful Roman families who had thrown in their lot with the despised and persecuted people who had accepted the story of Jesus of Nazareth, and who, in common with the slave and petty tradesman, shared in the hard trials of the Christian life, and welcomed the joys and solace of the glorious Christian hope. These striking memories of the Christian dead, who in life bore great names and possessed ample means, date from the first century onward. One of the more famous of these very early catacombs, the cemetery of Domitilla, was the work of the members of the imperial family--of near relatives of the Emperor Domitian.