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="20110509120347" timestamp="2011-05-09T12:03:47Z" ns="0" title="Technische Veränderungen am Wartburg 312" />
        <page value="20110820212947" timestamp="2011-08-20T21:29:47Z" ns="0" title="Technische Veränderungen am Wartburg" />
        <page value="20110913122742" timestamp="2011-09-13T12:27:42Z" ns="0" title="VEB Karosseriewerk, Meerane (vormals Hornig &amp; Co.)" />
        <page value="20110916173430" timestamp="2011-09-16T17:34:30Z" ns="0" title="Cottbus Eichenplatz" />
        <page value="20110916173518" timestamp="2011-09-16T17:35:18Z" ns="0" title="Stolberg-Harz Friwi" />
        <page value="20110916173627" timestamp="2011-09-16T17:36:27Z" ns="0" title="Apolda Külz-Straße" />
        <page value="20110916173711" timestamp="2011-09-16T17:37:11Z" ns="0" title="Flugplatz Allstedt" />
        <page value="20110916173801" timestamp="2011-09-16T17:38:01Z" ns="0" title="Reichenbach Feldweg" />
        <page value="20110919153340" timestamp="2011-09-19T15:33:40Z" ns="0" title="Technische Veränderungen am Wartburg 1.3" />
        <page value="20110923062630" timestamp="2011-09-23T06:26:30Z" ns="0" title="Schmierplan 312" />
      </results>
    </querypage>
  </query>
</api>