I am trying to add a div container with an image in it at the top of my header (like a site wide banner), but I cannot figure out what file I need to create in my theme folder to do this.
Basically I just want to add this code above all the other content in my header and need to know how to do this for my theme:
<div class="top_banner">
<img src="topbanner.jpg"/>
</div>
