First Knight (1995)

Continuity mistake: In the scene at the end when King Arthur's funeral raft is floating away, you see white smoke coming from the wood at the foot of the raft. Cut to the shore, and the flaming arrow is lit and shot. Cut to the raft, and the flaming arrow hits the now smokeless raft in the spot where the smoke was. Cut to the shore, then back to the raft, where the fire begins to grow on both sides of the raft, nowhere near the now smokeless and flame-less spot where the flaming arrow hit in the previous shot.

Prince Malagant: They say this was once the greatest castle ever built. Now moss grows in the hall where kings once feasted, and peasants cart away the mighty walls stone by stone to make shelters for their pigs. Hah! Such is glory.

Trivia: Prince Malagant describes the oubliette where he imprisons Guinevere as just having "walls of air." This is a reference to the fate of Merlin, who was sealed away in a "prison of air."