Possible areas of Brennenburg Castle

[bloodng0re]

Brennenburg and Aldstadt are not real places, but the Amnesia wiki says the castle was probably located in northeastern Poland or Konigsberg in Little Russia. Frictional have not confirmed anything but it doesn't really matter that much anyway.

Exactly I totally know that this is all fictional, but due to the strikingly high historical accuracy of the game, you can't help but let your imagination wonder if these areas may exist.
Brennenburg, although similarly sounding to the more recent Brandenburg of Berlin is not the same area. Konigsberg and Kaliningrad are the same exact city, so my geographical location is correct. However, I don't believe Aldstadt is the same as Kaliningrad, but rather an outlying town of Kaliningrad.