Bootstrap 3 sub theme - missing header for banner?
I think you are using the Bootstrap 3 subtheme and in that case you have to modify the corresponding templates. So to do that create a new directory "templates" in your subtheme directory and then there you have to place a page.tpl.php then edit as per your needs.

For further reference you can follow, Theming Guide &amp; Bootstrap sub-theming "how to"