Factual error: At the start of the excommunication scene, the monks are chanting Dies Irae, a thirteenth century Catholic poem, but St. Thomas Becket died in 1170, almost a century before the poem was written.
Becket (1964)
1 mistake - chronological order
Directed by: Peter Glenville
Starring: Peter O'Toole, Richard Burton, John Gielgud, Gino Cervi
King Henry II: Will no-one rid me of this meddlesome priest?