He's referring to the castle he had in 1.8.1.
Oh.
That was ages ago ._.
And was unrelated to the server itself.
It was my own fault for fucking with stuff I shouldn't have, and corrupted the entire file system on the server.
So apologies. I uploaded a copy of the map for public download on the server about two-ish days before I fucked it up. If someone downloaded a copy of it, I can add it in as a second creative world.
Or we can paste it into the current map, I guess. Someone would have to do it for me though, since I don't know how to work those programs :v