Classroom 3C is where Defence Against the Dark Arts class is taught, located on the third floor. An iron chandelier is hung from the ceiling, as well as a dragon's skeleton. On one end of the classroom stands a projector that is activated by magic. Several desks and tables can be found in the classroom as well as some sets of large windows. The classroom decoration had several changes over the years, spanning from lots of pictures of Gilderoy Lockhart to tons of skeletons and Shrunken Heads.
