Maybe it was used for educational purposes, someone collected bones from different places until they had a whole skeleton?
And then when they died, nobody wanted to keep it and it was buried as it was human remains after all.
And then when they died, nobody wanted to keep it and it was buried as it was human remains after all.
I guess there are burial mounds used for long periods - like the mount of olives in Israel. But even then it would take quite a bit of effort to find the 2000 year old remain over a more recent one