A Different Header Image for Each Category in the twenty eleven WordPress theme, we often come across topics over on the WordPress.org forum which we think are generic enough to make a good Twenty Eleven Child Theme download, and this theme comes from such a post.
The topic starter is creating a travel blog where each county is a category, we can add a different header to posts and pages but not to a category, we thought of several ways we could do this, and settles on a simple solution.