each student has carved something into some part of the tower. and I’m talking every single student, going all the way back to the first class ever taught by the founders. Rumor has it that rowena herself carved a tiny eagle symbol made out of her initials somewhere in the common room and if you can find it during your seven years at hogwarts you’ll have good luck in passing your exams (hint: it’s in the bottom left corner of the third stone in the center above the fireplace, right above the elaborate signature of one Filius Flitwick). the stone walls of the tower look weathered but if you look closer they’re covered in initials and signatures, little symbols and drawings. Some of the more artistically inclined students have added more elaborate designs, while others simply initial. The unspoken rule is that you should wait till your seventh year to add your mark on the tower. Even though countless students have passed through Ravenclaw house, there always seems to be just enough room for everyone. One student, through a good amount of diligence, observed that a handful of pristine stones appear each year in various locations to keep the tradition going.