Somebody already did a survey. The largest [priest cemetery] is Dachau.
I am sure then, that you can tell me, how many priests were buried in Dachau, and in which country we find the second largest priest cemetery found by the survey.
I guess you can't, you probably fell for a random nonsense remark and the survey is from alice's lampshade land.
Alojs Andritzki was a priest and inmate of KL Dachau. Wikipedia tells us that his body was incinerated and
His ashes were sent in an urn to his parents and the urn was interred in a Dresden cemetery on 15 April 1943.
Look: Dresden, not Dachau. (That's an estimated 4 hours at 100mph)
You will understand that readers of your posts may want to know more about the survey you mentioned. When was it done? Where can we read it? Who wrote it? What do they make soap from in the land where the authors of the survey live?