Burg Boetzelaer 1746, engraving after a drawing by Jan de Beijer
<bdi><a href="https://en.wikipedia.org/wiki/en:Jan_de_Beijer" class="extiw" title="w:en:Jan de Beijer"><span title="Dutch painter (1703-1780)">Jan de Beijer</span></a>
</bdi>
1746
Theodor Wildemann: <i>Rheinische Wasserburgen</i>. Ges. f. Buchdruckerei, Neuss 1954, S. 14