Giant Doors of Tartaria & Mud Flood Buildings for Giants

After watching some mud flood videos and seeing the large doors on some buildings it occurred to me that even in my town the council house, the synagogue, and even the reformation church has giant doors. It's quite usual to find these giant doors at government buildings, cathedrals, and museums. It doesn't make sense to have so huge doors for people of the sizes like us. These doors seem like were built by giants for giants before the reset mud flood of Tartaria / Atlantis.