The thing that made the things for which there is no known maker.

Every painting needs to have had a painter, and every building needs to have had a builder.
Every thing for which there is no known maker, needs to have been made by something.
Maybe, thousands of years ago, a conversation like this took place... and brought theism into the world. I wonder if the dogmatism came along as quickly as in THIS example?

This is definitely one for the atheists and anti-theists. I don't expect religious folk to really get this one.