A burnt out pile of rubble...
Either that, or it's a Thalmor embassy.

Either way, it'll be a burnt out pile of rubble...at least once I'm finished with it.

But, if it's not, I would rebuild the Blades the proper way, not Delphine's traitorous way. I don't work for her, she doesn't give orders to me. The blades will obey and protect me the way they should.