Organizationally, "catacomb" communities were usually not connected (organizations existed only in the NKVD cases). Therefore, it is difficult to define the general ideology of the movement. In the underground were both communities that were quite loyal to the Moscow Patriarchate, but did not have the opportunity to register and gather legally, and those who believed that the power of the antichrist had come, and there could be no contact with the official church. Despite the absence of a common ideology and any organization, the underground existed — as a religious community and subculture.