Great Tomb of Nazarick is a replica of the Tomb from the anime Overlord.
So you have the full version of Great Tomb Nazarick in this map. However details it is I am not sure.
If according to the anime, you should get about 7 levels of map. However in the preview given by the creator, he only shows us the outside of the tomb.
But still this is something great even if it’s just the outside.
Now is the time for you to be creative and build the inside!