library(WikipediR)

# Retrieve all pages in the "Person_der_Reformation" category on de.wiki
persons <- pages_in_category("de", "wikipedia", categories = "Person_der_Reformation", limit = 500)
persons

<api batchcomplete="">
<query>
<categorymembers>
<cm pageid="2720179" ns="0" title="Jacobus Acontius"/>
<cm pageid="1347785" ns="0" title="Sebastian Aitinger"/>
<cm pageid="7892887" ns="0" title="Martial Alba"/>
<cm pageid="2960360" ns="0" title="Albrecht (Nassau-Weilburg)"/>
.....
</categorymembers>
</query>
</api>