Well Being Holland Dutch myself, by ancestry, and having thoroughly thought this out, the location I chose with Holland was a city of Dordrecht.
A river community, with the city situated on a high "Almost" Island. Several Churches from that time period I am writing about, were built near this high point and it is not unheard of for Dutch Families to hang on to burial chambers for generations and reuse them, as Burial plots on land and within the church yard are not always easy to find.
The PLOT thickens.... Best Regards, Rassilon