Where is buried Dorothea Benze, the mother of Carl Friedrich Gauss, a famous German mathematician?
Input data: some sources include her last name as Benze, some say Bentze. She could have adopted her husband’s name, Gauss. Her first name is also not clear: Dorthea vs Dorothea.
According to available information, she died in Göttingen, Germany on April 18th, 1839.
Here are her date of birth and date of death: June 18th, 1743 - April 18th, 1839, source: familysearch.org
But this biography contains her date of birth as 1742 and her name as Dorothea Benze: archive.org
On the same site (familysearch.org) is written that she was buried in Oldenburg, Germany, but that is not certain either.
Now, it seems to be the case that all versions of names are 'correct': Dorthea and Dorothea, Benze and Bentze, as for one the 'exact spelling of names' back then was not really 'a thing', yet, and consequently one can find different versions of those names in different sources. As a matter of fact, Gauß' own family was written as 'Gooss' previously, one name that still appears in quite few variations in the region today, although by now solidified for administrative control reasons in the different lineages.
I tried google search and findagrave.com search. None of it worked.
EDIT: There has been an addition to the Gauss' grave in the previous 24 months. It consists of a small white monument on the right. Please visit link to Google Maps photo gallery. There is a German text there saying that it is a family grave but it does not specify who exactly is there buried.