This office, used by Severus Snape during the lengthy amount of time that he spent as Potions master at Hogwarts School of Witchcraft and Wizardry, was a gloomy and dimly-lit room found in the school dungeons. The shadowy walls were lined with shelves of large glass jars filled with slimy, revolting things, such as bits of animals and plants, floating in potions of varying colours. Snape's collection grew over time - in 1994 Harry Potter noted there were more jars than in 1992, and by 1996, there were hundreds of them, even though Snape was no longer teaching the subject of potions. The office had a fireplace. In a corner, there was a cupboard containing Snape's private stock of Potions ingredients. In 1997, the office also contained a table, but it is unknown if it had been there before.