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="20150104010045" timestamp="2015-01-04T01:00:45Z" ns="0" title="Smoki Chowańce" />
        <page value="20150104010157" timestamp="2015-01-04T01:01:57Z" ns="0" title="Monstra" />
        <page value="20150111004049" timestamp="2015-01-11T00:40:49Z" ns="0" title="Cechy postaci" />
        <page value="20150112233155" timestamp="2015-01-12T23:31:55Z" ns="0" title="Walka" />
        <page value="20150115182039" timestamp="2015-01-15T18:20:39Z" ns="0" title="Rodzaje terenu" />
        <page value="20150209173936" timestamp="2015-02-09T17:39:36Z" ns="0" title="Bonusy ataku" />
        <page value="20161111131416" timestamp="2016-11-11T13:14:16Z" ns="0" title="Magia" />
        <page value="20161111144136" timestamp="2016-11-11T14:41:36Z" ns="0" title="Strona główna" />
        <page value="20170211145931" timestamp="2017-02-11T14:59:31Z" ns="0" title="Ulepszanie uzbrojenia" />
      </results>
    </querypage>
  </query>
</api>