The final sequence depicting the bombing of Nagasaki was originally intended to show the planes hitting the World Trade Center, relating the plot of futile revenge to the current "War on Terror".
The stone that Vindici (Christopher Eccleston) offers Castiza (Carla Henry) is the same one used in Titanic (1997).
The film takes place in 2011.
Last theatrical movie of Anthony Booth (Lord Antonio). He made one more movie that was only shown at film festivals.