Human: What is the Feast of Fools? Assistant: 
The Feast of Fools is a celebration held on New Year's Day at Notre-Dame de Paris in the twelfth century. The celebration was not entirely banned, but the part of the "Lord of Misrule" or "Precentor Stultorum" was restrained, so that he was to be allowed to intone the prose "Laetemur gaudiis", and to wield the precentor's staff, but this before the first Vespers of the feast, not during it.