Why did Carnegie leave the railroad?

Carnegie left the railroad because he had wanted to invest in multiple businesses. He invested in businesses like oil, iron, and coal.

I hope this helps you!

Firstly, it can be said that it was not Nero. It would have helped immensely if the choices were given. "Constantine" was the roman emperor who had an arch built in his name. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.