Ooooooh, my favorite conspiracy theory. Mud flood! I love the mud flood. It's so baroque and ornate. Those who hold this theory assure us that our ancestors were too stupid to build these buildings we see today. Yet, oddly enough, they believe that some other race of people was able to build these buildings. I guess they think we poor Christian white people just don't have the skills of some Mongoloid race of horse-piss drinkers on the steppes of Eastern Europe. They may live in yurts today, but a few centuries ago, damn could they build. And then, somehow, they got wiped out by mud? Which only rose halfway up their basement windows? Hmmmm.