👉 "Arch Christendom" is like saying we're building a medieval castle of faith, complete with gargoyles made of prayer beads and a moat filled with questionable theological debates. It's the idea that Christendom, that grand, sprawling Christian empire, has been constructing itself since the Middle Ages, with a lot of medieval art, a whole lot of dogma, and a fair amount of historical revisionism.
Here's an edgy example sentence: "With 'Arch Christendom', I now believe my neighbor's questionable life choices are just a 'redemptive' archaic practice, and I'll be praying for their soul to ascend from the inferno of moral relativism."