Tower of Babel was Made of Bricks and Slime

According to the Bible, the Tower of Babel was made of Bricks and Slime. The engineers responsible for the building project were clearly in favor of using malleable, even liquid, building materials.

By Pieter Bruegel the Elder - Levels adjusted from File:Pieter_Bruegel_the_Elder_-_The_Tower_of_Babel_(Vienna)_-_Google_Art_Project.jpg, originally from Google Art Project., Public Domain, Link