The Capitol in Washington, the Pyramids of Gaza, and the Great Wall of China. What if someone were to tell you that everything you’ve been taught about them is wrong and that these structures were built by an ancient civilization long before our time?

Naturally, you would be inclined to roll your eyes.

As crazy as this sounds, thousands of people on the internet are convinced that an ancient mega civilization called Tartaria, or the Tartarian Empire, is responsible for some of human civilization’s most significant architectural achievements.

Just like stories of the lost civilization of Atlantis or the lost continents of Lemuria and Mu, this architectural conspiracy has been gaining some ground in recent years.

Starting as a bunch of videos by some creators on YouTube, this theory quickly spread, and now it has gathered a following of over 14,000 believers.

And just like the previously mentioned lost civilizations, their story ends in submersion, although this one is a mud flood.

A mud flood was said to have wiped out this Empire, leaving only architectural marvels that could not be destroyed by the flood or our “backward” human hands.