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="20230303121810" timestamp="2023-03-03T12:18:10Z" ns="0" title="Ordonnantie waer nae de Kinderen van &#039;t nieuwe Arme Weeshuys haer sullen moeten reguleeren" />
        <page value="20230303121811" timestamp="2023-03-03T12:18:11Z" ns="0" title="Korenbeurs" />
        <page value="20230303121815" timestamp="2023-03-03T12:18:15Z" ns="0" title="Ordonnantien voor den Thesaurier" />
        <page value="20230303121815" timestamp="2023-03-03T12:18:15Z" ns="0" title="Ordonnantie voor de Tappers en de Herbergiers, Anno 1588 den 12 Juny" />
        <page value="20230303121817" timestamp="2023-03-03T12:18:17Z" ns="0" title="Ordonnantie voor de Appel-meeters, Anno 1637 den 29 December" />
        <page value="20230303121818" timestamp="2023-03-03T12:18:18Z" ns="0" title="Ordonnantie van den geswooren Laken-meeter ende Looder, Anno 1642 den 22 Augusti" />
        <page value="20230303124603" timestamp="2023-03-03T12:46:03Z" ns="0" title="Oude Provenhuis" />
        <page value="20230303124604" timestamp="2023-03-03T12:46:04Z" ns="0" title="Snouck van Loosen Ziekenhuis" />
        <page value="20230303124604" timestamp="2023-03-03T12:46:04Z" ns="0" title="Elsenburg" />
        <page value="20230303124605" timestamp="2023-03-03T12:46:05Z" ns="0" title="Hemeltje" />
      </results>
    </querypage>
  </query>
</api>