This woman is mentioned but once in the New Testament (Ac 12:12), but in a connection to arouse intense interest. Since she was the mother of Mark, she was also, in all probability, the aunt of Barnabas. The aunt of one member and the mother of another of the earliest apostolic group is a woman of importance. The statement in Acts, so far as it concerns Mary, is brief but suggestive. Professor Ramsay (see Paul the Traveler, etc., 385) holds that the authority for this narrative was not Peter but Mark, the son of the house. This, if true, adds interest to the story as we have it. In the first place, the fact that Peter went thither directly upon his escape from prison argues that Mary's house was a well-known center of Christian life and worship. The additional fact that coming unannounced and casually the apostle found a considerable body of believers assembled points in the same direction. That "many" were gathered in the house at the same time indicates that the house was of considerable size. It also appears that Rhoda was only one of the maids, arguing a household of more than ordinary size. There is a tradition of doubtful authenticity, that Mary's house was the scene of a still more sacred gathering in the upper room on the night of the betrayal. We conclude that Mary was a wealthy widow of Jerusalem, who, upon becoming a disciple of Christ, with her son, gave herself with whole-souled devotion to Christian service, making her large and well-appointed house a place of meeting for the proscribed and homeless Christian communion whose benefactor and patron she thus became.
Louis Matthews Sweet