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Discover LudwigThe phrase "the oldest known" is grammatically correct and can be used in written English.
It is typically used to describe something or someone that is the oldest among a group of known items or individuals. Example: "The oldest known human settlement dates back over 10,000 years."
Dictionary
the oldest known
adjective
Of an object, concept, relationship, etc., having existed for a relatively long period of time.
Exact(60)
It is the oldest known example of monumental architecture and contains the oldest known temple dating back 11, 600 years.
Opium is one of the oldest known drugs.
Src is the oldest known cancer-causing molecule.
She was the oldest known lesbian in America.
The workbook is the oldest known Lincoln manuscript.
Roquefort is one of the oldest known cheeses.
"Auctions are truly the oldest known profession," she said.
The Cairo toe is the oldest known prosthesis.
The oldest known synagogue in Kaifeng was built in 1163.
The oldest known Chinese map is dated about 1137.
Red algal fossils are the oldest known algal fossils.
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