A 9th-Century temple carved into the solid rock face of India's Gwalior Fort is the origin of the concept of nothingness.
According to the BBC43270.44
51The invention of the zero was a hugely significant mathematical development
“I’m experiencing nothingness. What are you doing?” the gymnosophist replied.
“I am conquering the world,” Alexander said.
They both laughed; each one thought the other was a fool, and was wasting their life.
88This story takes place long before that first zero was inscribed on Gwalior’s temple wall
Image credit: BBC