where is the center column template file?

[BuddyH]

Hi, I can't for the life of me find the center column tpl file. I found the left & right box tpl files no problem, but in main_page_tpl.php the only code I can find is:

<?php
 /**
  * prepares and displays center column
  *
  */
 require($body_code); ?>

I'm looking for <div id=indexDefault class= .centerColumn>

Can anyone tell me pretty please :)