Did the Latins, apart from a few isolated and unofficial instances, ever attempt to force the Greeks to insert "and the Son" into the Creed? I know that for the past several centuries at least the Latins have not allowed the addition either in the Greek rites or in the Greek text when sung in the Latin rite because it would be heretical. (The Greek word used for "procession" in the Creed is not equivalent to the Latin word. It denotes ultimate origin.) But I wonder whether this was the case from 1000 to 1300 for instance.