Has the historic figure Ivan the Terrible
ever been portrayed by Vincent Price?
http://spinningspyder.typepad.com/schlocko/images/vincentprice.jpg
Not according to the IMDB, though it’s possible he played a character based on Ivan.
Vincent Beck played Ivan in a Monkees episode (again, according to IMDB) and Conrad Veidt did in the silent era.
One of the greatest examples of world cinema is Eisenstein’s anti-cinematic Ivan the Terrible, parts I and II. (He died before completing the trilogy he envisioned.)