Trash heap
Why nobody wants it:
"At present there is no heating, no running water, there is serious damage to the facades, the roofs are falling apart and inside there is a lot to do too," Moehring admits, saying renovation costs would be "considerable".
It's a heap, so of course the best option is to raze it. House refugees in it? No, that would not do because the conditions would be substandard. I'm sure that there are enough refugees who have the necessary skills to do the work, though. Actually, that's a great option for a lot of unused government buildings. (And why is the government so intent on building more when they have so many vacant?)