“The apostasy of the city of Rome from the vicar of Christ and its destruction by Antichrist may be thoughts very new to many Catholics, that I think it well to recite the text of theologians of greatest repute. First Malvenda, who writes expressly on the subject, states as the opinion of Ribera, Gaspar Melus, Biegas, Suarrez, Bellarmine and Bosius that Rome shall apostatize from the Faith, drive away the Vicar of Christ and return to its ancient paganism. …Then the Church shall be scattered, driven into the wilderness, and shall be for a time, as it was in the beginning, invisible; hidden in catacombs, in dens, in mountains, in lurking places; for a time it shall be swept, as it were from the face of the earth. Such is the universal testimony of the Fathers of the early Church.”- Henry Edward Cardinal Manning, The Present Crisis of the Holy See, 1861, London: Burns and Lambert, pp. 88-90)
The SSPX chapels are the “catacombs.” Think about it.