Which just shows how much things have changed.
After the disasters in Chicago and San Fransisco, the people of those cities picked themselves up and rebuilt. Had those disasters happened today, nothing would have been allowed to be built back due to all of the memorials on the foot prints of the fallen buildings. Back then people mourned their dead and built for the living. Today it seems to be the opposite.
You say it can't remain vacant, instead of telling me that you should tell the architects.