The Room of Requirement

"Sometimes it is there, and sometimes it is not, but when it appears, it is always equipped for the seeker's needs" - Dobby the House-elf.

Builder Wookieewarrior captures the look and feel of the famously elusive non-existent/existent Hogwarts room from the Harry Potter series of books. Look closely and you will find items of significance from the books scattered about the room including the Lost Diadem of Ravenclaw.
Now if only I could get this room to appear with a desk full of sorted LEGO bricks for when I start my next project.