You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20130923181225" timestamp="2013-09-23T18:12:25Z" ns="0" title="Pagina principale" />
        <page value="20130925004030" timestamp="2013-09-25T00:40:30Z" ns="0" title="Dublin Core" />
        <page value="20130925004042" timestamp="2013-09-25T00:40:42Z" ns="0" title="The Event Ontology" />
        <page value="20130925004114" timestamp="2013-09-25T00:41:14Z" ns="0" title="Browse Ontology Vocabularies" />
        <page value="20131108114754" timestamp="2013-11-08T11:47:54Z" ns="0" title="Da 25 anni Accanto a Voi" />
        <page value="20131117013243" timestamp="2013-11-17T01:32:43Z" ns="0" title="Centro anziani" />
        <page value="20131117153058" timestamp="2013-11-17T15:30:58Z" ns="0" title="Donazioni" />
        <page value="20131120173607" timestamp="2013-11-20T17:36:07Z" ns="0" title="Associazione Volontari Di Don Orione - Onlus" />
        <page value="20131211190051" timestamp="2013-12-11T19:00:51Z" ns="210" title="Eventi:Pranzo di Natale 11/12/2013" />
        <page value="20131211190118" timestamp="2013-12-11T19:01:18Z" ns="210" title="Eventi:Pranzo di Natale 13/12/2013" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>