<https://theonlineportraitgallery.com/portrait/charles-ii-gonzaga-duke-of-mantua-and-montferrat-2/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://theonlineportraitgallery.com/portrait/charles-ii-gonzaga-duke-of-mantua-and-montferrat-2/>