The reverse depicts the coat of arms of the Hogwarts School of Witchcraft and Wizardry. The animals of the four houses are shown here above the school's motto: "Draco Dormiens Nunquam Titillandus" Underneath the coat of arms is the face value as well as the Harry Potter logo. 50 EURO
Reference
France. 50 Euro (Silver) 2021, Monnaie de Paris. CoCo FR-2021-0024.