Is its specific location relevant? Yesish. If so, LPTF list of countries? Belgium.
Is its general location relevant? Yope. If so, urban/rural This. /suburban? Plain, forest, mountain, swamp, water feature? Was it moved at some point? No. Did the movement reveal it, or hide it?
Was it desired several decades before? Yes. Would it have been utilized in some way at that time? Yesish. Was something else utilized in its place? Not "in it's place", but yes. Is this why it was no longer needed decades later? No.
Was it unique? No. Historically important? Yesish.
Is its method of disposal relevant? Yes. If so, fire? burial? This is closest. at sea? crushing? separation of pieces? Was it eaten? No to all.