My theory about Titans:
Once they lived on earth huge people, called the Titans the only thing people can do is run away, hide and wait until the threat ceases ... It was worse ....
People have decided to distract the Titans to the builder can build great walls were killed only 4% of the population during the construction of the walls by the Titans who ate builders. The only way to defeat the Titans are: Maneuver-dimensional and sharp swords. However, only 2% were killed the Titans with what the rest stood against the wall to try to destroy it. But in 900 years, human population grew by 2% over what was already quite a lot of people, humanity has decided to call its secret orenż and knock the Titans at the end. It worked ... but there were too many victims and human population decreased by 1.2% over that mankind had to rebuild.
The second king decided in 108 years decided to call walls in honor of the three queens:
My theory silent sense, so who would like to read it ;_;