The cross shown right before
Peter O'Toole's credit (as Pope Paul III) and
Max von Sydow's credit (as Cardinal Von Waldburg) in the opening credits of
The Tudors (2007), can be briefly seen in the opening credits of
The Borgias (2011) shortly after the Papal Ring is kissed during its first season. Additionally, both series were historical dramas in which the music was done by
Trevor Morris.