this is The Library from David Tennants last series.
if you want to download it when its complete, you'll need the Dalek Mod (1.12.2 Update) (Update 47)
because if you don't have the Dalek Mod installed the TARDIS and several other blocks will disappear.

Thing's that are complete:
Reception,
The TARDIS,
massive Corridor,

Thing's that are being built:
Data Core,
Main command node,
Place where River song died,
Place where Miss Evangelista died,


And Much much more.......