Here is my entry for the Harry Potter Community build:
The Divination Classroom!!!
Sorry for the blurry pictures.
I got the idea for the MOC from this basic description on Harry Potter wiki:
The Divination Classroom is where Divination classes are taught at Hogwarts School of Witchcraft and Wizardry. It is located in the North Tower. It is accessible through a trapdoor and is described as looking like a cross between somebody's attic and an old-fashioned teashop. The Divination Staircase leads to this classroom.
Professor Trelawney tells Harry her second prophecy.
The MOC without the minifigs.
Please feel free to comment as I know that there will be flaws other than the photograph quality.