Defense against the Dark Arts classroom with revolving office structure.
About this creation
I wanted to be show the DADA classroom and the offices of 4 of the DADA professors (There were really 7 DADA professors but we never see Quirrell's office in Sorcerer's Stone or Carrow's office in Deathly Hallows and Snape kept his old office in the dungeon in Half Blood Prince). I created two structures. The classroom is stationary. It will be attached to an interior corridor of the castle. The blank windows will contain pictures.
Currently the roof comes off of this part of the structure, but I will probably hinge it to add a chandelier and the dragon skeleton from the movies. You can remove the wall portion to reveal the professor's office if you like and the cabinet can be flipped to show the Snape Boggart when Lupin is the Professor.
To change to a different professor's office,
Slide the office structure over.
Remove the wall covers and turn to the office you want to reveal.
Switch the covers so that the office of the professor you want now has the wall with the door.