[SPOILER] Brennenburg Castle's overall layout (complete map)

[Kein]

Did you do it from scratch or used some references from the draft map in super_secret.rar? I always was curious what is behind that door in the "hidden" room on the to Agrippa. Obviously it is the only actual entrance in this room, through which you are supposed to enter it as a normal man (not everyone is do it Daniel-way), but still... curiosity.