Bluestone Mansion - No idea what to put

[JoeyD473]

For the next D&D adventure I am running I am making a mansion. I would like it to have 3 floors, a basement is going to be just one big room (Probably) and first and second floor. I started doing it but I have no idea what rooms it should have and the sizes of the rooms.

A quick and dirty history of Bluestone Mansion

Bluestone Mansion is just outside of the town of Bluestone and has been abandoned for many years. It is believed to be haunted.

Though not known except to members of the Royal family and a few select supporters and advisers Bluestone Mansion was once a Royal retreat and safe zone incase of attack. A magic ammulet given to members of the Royal Family and those same select few can teleport them instantly to the basement of this mansion which is about 100 miles from the capital city.

I am doing the map in CC3 and is currently 400' wide by 240' not including two sections in the front of the mansion which is designed for guards. So what rooms should be on the first and second floor of this mansion, and about what size should they be? I can also make the mansion smaller if need be (I could make it bigger but I would prefer not)

[Antimon]

Some ideas for rooms:

• library
  smoking room
  dining hall
  ancestors gallery
  armory
  servant's room
  observatory
  atrium
  store room
  treasury
  stable
  guest room
  ballroom
  map room
  writing room
  guard's room
  entrance hall
  chapel
  bathroom
  bedroom
  kitchen
  bar
  latrine
  wine cellar
  trophy room
  mirror room
  alchemist's laboratory

[NeonKnight]

Things it will need as a medieval place:

Cistern (A tank, usually on the roof to collect rain water, and provied rudimentery running water)

Solarium (A room with ample lighting, often where the lord/lady slept)

Conservatory (Music Room)