Bathrooms were installed in Hogwarts after Muggles invented modern plumbing (Pm). There appear to be a boys’ bathroom and a girls’ bathroom on each floor, although the girls’ bathroom on the second floor is out of order and avoiding because it is where Moaning Myrtle spends most of her time (CS8). There is also a special bathroom for prefects located on the fifth floor (GF23).
Acting Head Antechamber Armour August at Hogwarts Black Punishment Quill blackboards at Hogwarts Bouillabaisse Bust of Paracelsus Christmas at Hogwarts Christmas ornaments Christmas trees Clothing at Hogwarts Come and Go Room Common Room Confiscated and Highly Dangerous Courtyard at Hogwarts Death of Students or Staff Detentions Diamonds Draco dormiens nunquam titillandus Emeralds Fake Galleons
First Years’ shopping list Gryffindor House Hallowe’en at Hogwarts Harry’s Second-Year shopping list Head of House History of Hogwarts Hogwarts Bathrooms Hogwarts Bell Hogwarts Board of Governors Hogwarts Boats Hogwarts Book of Admittance Hogwarts Classrooms Hogwarts Feasts Hogwarts Fires Hogwarts Hourglasses Hogwarts Houses Hogwarts Prefects Hogwarts School Song Hogwarts Staff Hogwarts Students Hogwarts Walls Hogwarts Windows
House Banners House Cup House Points Hufflepuff House Jinx on the DADA position Jinxed D.A. Names List Knitted Elf Hats, Socks, and Scarves Lighting at Hogwarts Never Tickle a Sleeping Dragon Nighttime at Hogwarts Other Denizens of Hogwarts Castle Portrait hole Potions Dungeon Punishment at Hogwarts Ravenclaw House Rubies Sapphires School Song Slytherin House Statue of Gunhilda of Gorsemoor The Founders The Sorting Ceremony