This all came to mind recently as I was thinking (as you do) about the art of the banner in Christian churches. You see banners all over the place in British Christianity at least, though probably more so the more evangelical the church, and I can testify to having seen some pretty spectacular ones in German evangelical churches (don't ask), whose aesthetic preferences seem to be for banners constructed entirely out of metallic fabrics. Gaudy. But, like the Christian art you can buy in Christian bookshops, they always involve words. The classic Christian banner tends to take a Bible verse, 'I am the light of the world' or 'I am the way, the truth and the life', and illustrate it with pictures that go with the words - lights, paths, basic allegorical images.
That's obviously pretty different to most contemporary art (although, as a side point, contemporary art involves text in a way that classical art didn't tend to: I wonder why?) But it's also crucially different to the sort of religious art that you found in churches as paintings or stained glass windows, because banners-with-text are all about assertions or statements, where religious art tends to illustrate stories. That in turn reflects a general shift in the way that a lot of evangelicals read the Bible: they're not looking for narratives so much as for truth claims, encouraging words, or rules. The Bible, and probably Christianity more generally, becomes a source of doctrinal statements, instructions, and fridge-magnet wisdom.
Photo credit: Kentishman