Answer by Joe Hoyle for Loop through custom taxonomies and display posts

I thought I would provide another answer as the above one is a little hacky, also I added another layer that gets all taxonomies for a post_type.

$post_type = 'post';// Get all the taxonomies for this post type$taxonomies = get_object_taxonomies( (object) array( 'post_type' => $post_type ) );foreach( $taxonomies as $taxonomy ) :     // Gets every "category" (term) in this taxonomy to get the respective posts    $terms = get_terms( $taxonomy );    foreach( $terms as $term ) :         $posts = new WP_Query( "taxonomy=$taxonomy&term=$term->slug&posts_per_page=2" );        if( $posts->have_posts() ): while( $posts->have_posts() ) : $posts->the_post();            //Do you general query loop here          endwhile; endif;    endforeach;endforeach;

It would be recommended to add each post found to a $post__not_in array, so you could pass that to the WP_Query to prevent duplicate posts coming through.