Asterisk Implementation Language

Apologies for what is probably a very basic question.
I am a windows developer keen on branching out into the world of linux programming. I stumbled across asterisk from wikipedia. It has really sparked my interest in VOIP. After reading the asterisk website for about an hour - I still haven’t had my most basic of questions answered - What language is it written in?

Again sorry for this fundamental question.


it is written in C