Potions is a class taught at Hogwarts School of Witchcraft and Wizardry. In this class, students learn how to brew potions, following specific recipes and using various magical ingredients to create their potions, starting with simple ones and moving to more advanced ones as they progress in knowledge. A standard potions kit includes plant ingredients such as Belladonna and supplies such as glass phials. Potions lessons take place in the Hogwarts dungeons.

This is where the potion ingredients and old books are stored.