What are programming languages written in?
This is my first question so be nice lol... Think of it this way. Python is written in C, which is written in an older C compiler, which is written in an even older C compiler, which is written in B, which is written in (I think) BCPL. I am not sure what BCPL is written in, but it seems that there must be an original language somewhere? In other words, every programming language is written in an older programming language. So what came first, and what was that coded in?

This is my first question so be nice lol...
Think of it this way. Python is written in C, which is written in an older C compiler, which is written in an even older C compiler, which is written in B, which is written in (I think) BCPL. I am not sure what BCPL is written in, but it seems that there must be an original language somewhere?
In other words, every programming language is written in an older programming language. So what came first, and what was that coded in?