Circular room on the cover

[Alex]

No: HPFGUIDX 54412

I really don't think that the room on the cover is any of the rooms 
that people have mentioned, and here are my reasons:

Astronomy room: it doesn't look like a classroom. I recall 
Trelawny's room being described as stuffy. I imagine a lot of 
hanging fabrics, cushions, incense and trinkets, not stark walls, 
glass doors/windows and floating candles. Also the room 
pictured is too small to be a classroom (IMO).

Gryffindor common room or Harry's room: again, I imagine it 
being furnished with something other than candles, and I think 
the room pictured is too small to be either of these rooms.

Owlery: it's describes as being drafty, but I always imagined that 
the windows were open directly to the elements (not having 
glass in the windows). Also, I think the owls would not enjoy 
living with the magic candles.

The candles of course, could be temporary, either a spell that 
Harry has cast, or a spell that has been put in this room as a 
challenge for Harry to get past, but...

I think the room has to be some new place, probably at 
Hogwarts, but possibly some other magical place. I do think the 
room is circular, but it is a very small circle, too small to be a 
classroom or dormitory. It could be a central staircase-type room 
at Hogwarts or Azkaban that has doorways leading to rooms on 
the outside edge of the tower (prison cells or something else?)

I know people are guessing that it's one of these rooms that 
we've already seen because it's something safe that we can 
relate to, but it seems so empty, and with the magical floating 
candles and the intense look on Harry's face, I have to think it will 
be something new, and we'll just have to wait and see where it 
is...

~~aesob