This refers, of course, to the Roman Catholic Church. As the article notes, the Church has survived wars, invasions, famines, epidemics, and social revolutions.
The Catholic Church is governed by the world's oldest, continuous monarchy. Officially founded by Emperor Constantine in 325 A.D., its roots reach back into the first century, to Jesus and Peter as well as the other apostles. As Rome, along with its bishop and its adherents in the western Roman Empire, became more independent of the eastern Empire, it took on even more monarchical characteristics, lacking perhaps only official heredity...
The article goes on to discuss the democratization of Western religion, which coincided democratization of society as a whole - except for Catholicism. Whether that exeption will persist is unclear, but the author notes that the Church has survived more.