This weekend I visited the Royal Observatory in Greenwich. Surprisingly the sculpture by the end of the line was not there, so I wonder what happened to it.
Here's a picture of what it used to be like. Now there's only a line on the ground.
I asked four members of the staff but I didn't get a clear answer: The first staff member said it was removed by the artist. The second member of the staff said it was took by a bank because of unknown reasons. Other two staff members said that they had no idea.
I've done my research, but I haven't found a satisfactory answer so far.