Can the Plague Memorial building be moved?

Solution 1:

I just tested this in game version 2.1.1 and unfortunately the answer appears to be:

No. It cannot be moved. If you replace it, or destroy it, it is gone forever and cannot be rebuilt. Unless you are lucky enough to get the event a second time, I suppose. I don't even know if such a thing is possible.

Unfortunately, you have to choose between either the +2 unity or taking advantage of the benefits of whatever tile it landed on. I can think of many cases where you'd probably be better off destroying the building. +2 unity might be nice early-game, but later on, you'll probably want to get rid of the memorial and put something more productive there.