It depends a bit, I think, on how much drift you accept without considering the project to have changed so much it's not the same thing. But for instance some o

It depends a bit, I think, on how much drift you accept without considering the project to have changed so much it's not the same thing. But for instance some of the older universities in Europe are pretty much the same institutions working on the same goal (educating people) in the same buildings for many hundreds of years. The details of what the education provided ought to be, the balance between education and research, and the administrative details have changed quite a bit, but I think you can still make a case for this being the same non-religious collective project.