Monty Python and the Holy Grail (1975)

King Arthur and his Knights of the Round Table embark on a surreal, low-budget search for the Holy Grail, encountering many, very silly obstacles. They encounter a French taunter, a witch trial, a three-headed giant, and a castle of robe-clad teens who try to distract them from their quest. Despite the absurdity, they persist in their search.