Here’s the answer:
<?php
query_posts( "post_type=page&tag=TheTag" );
if ( have_posts() ) : while ( have_posts() ) : the_post();
?>
<a href="<?php the_permalink(); ?>"><?php the_post_thumbnail( array(280,186) ); ?></a>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
<?php the_tags('', ', ', ''); ?></div>
<?php endwhile; ?>
<?php endif; ?>
Is there by any chance a way that the tag “TheTag” is automatically replaced depentent of chosen tag?