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-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20160906201947" timestamp="2016-09-06T20:19:47Z" ns="0" title="Thomas Hazart" />
        <page value="20160906202121" timestamp="2016-09-06T20:21:21Z" ns="0" title="Heilige Odrada van Balen" />
        <page value="20160906202717" timestamp="2016-09-06T20:27:17Z" ns="0" title="Nicolaas Vanderveken" />
        <page value="20160906205418" timestamp="2016-09-06T20:54:18Z" ns="0" title="Mechelse beeldhouwkunst" />
        <page value="20160906205806" timestamp="2016-09-06T20:58:06Z" ns="0" title="Maria Fayd&#039;herbe" />
        <page value="20160908203827" timestamp="2016-09-08T20:38:27Z" ns="0" title="Hendrik Peeters-Divoort" />
        <page value="20160911125211" timestamp="2016-09-11T12:52:11Z" ns="0" title="4. Kempen (Balen - Mol - Geel)" />
        <page value="20160913080812" timestamp="2016-09-13T08:08:12Z" ns="0" title="Retie" />
        <page value="20160916175603" timestamp="2016-09-16T17:56:03Z" ns="0" title="Alcazar" />
        <page value="20160920200034" timestamp="2016-09-20T20:00:34Z" ns="0" title="De devotie tot de H. Odrada in de Kempen tijdens de 17de eeuw" />
      </results>
    </querypage>
  </query>
</api>