HR tag at giordani and gnifetti

why do you put the HR tag at the end of giordani and gnifetti?

 <div class="clear"></div>

  </div>

</div>
<!-- Close Page -->
<hr />
<div id="footer">
<?php print $footer ?>
<?php print $footer_message ?>
</div>
<?php print $closure ?>
</body>
</html>

it puts a horizontal rule... marinelli seem much better whitout it.