Not uncommon here in older properties
In fact, the standard form of beds in the more rural parts of the Netherlands untill about a 100 years ago.
www.google.com/search?q=bedstede&tbm=isch
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Tusk knows where you live, Fri 8 Oct 2021, 20:28,
Reply)
hole-in-the-wall, recessed or kitchen beds in the UK
Don't recall ever seeing portholes for viewing their occupants though
(, Sat 9 Oct 2021, 7:26, Reply)