We can see everything Google has indexed under a domain via a Google site: search using the Google site: operator with this format:
This lists everything Google has indexed for the www version of the domain, want a more detailed picture, remove www.:
This will show webpages indexed on sub-domains as well, looks like all the content for marcuslemonis.com is under the www version.
I own the classic-literature.co.uk domain and some of the content is shared over multiple sub-domains, see the Google site: search for an example:
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