Pre-production Tower of London was originally conceived years before production when the producer and director
Rowland V. Lee travelled to England to do research for an epic that involved British history. Lee's brother, Richard N. Lee then came up with the idea of developing a film about
Richard III of England, with Richard later explaining that "we agreed that we wanted to use the roughest, most hard-boiled period of all time, Row was for the Stuart era but I held out for the time of Richard". Rowland V. Lee presented the idea to
Universal Pictures and
The Hollywood Reporter announced in June 1939 that production was in plans to start. The studio gave the film a $500,000 budget with a 36-day shooting schedule that started on August 11. Trade papers stated on July 27 that
Brian Donlevy was being tested for the lead role of Richard III with
George Sanders being signed to the role one week later. Neither casting turned out when Lee approached
Basil Rathbone for the role. Rathbone had previously worked with Lee on
The Sun Never Sets and
Love from a Stranger. Rathbone was pre-occupied by filming
Rio at the time but was able to split his time between both productions during the first week of production. The role of Mord the Executioner was made for
Boris Karloff who had signed on to the studio for two additional features after
Son of Frankenstein. Initially, his character was to have a full black beard but this concept was removed in favour of a nearly hairless look.
Filming Art director
Jack Otterson developed a recreation of the tower in the studios backlot which involved consulting historical records and original blueprints of the 13th-century building. The completed structure stood 75 feet high and would later be re-used in other Universal Studios productions. The staging of historic battles at
Bosworth and
Tewkesbury led to a call for over 300 extras on August 19 and required the production to travel 20 miles north of Hollywood to a ranch in
Tarzana. Strong winds caused problems with the fog machines used, making it impossible to film. Lee had the crew move on to film the Battle of Tewkesbury scenes, which involved rain machines that made the extras' cardboard helmets fall apart. The assistant director of the film stated in his film diary that "a group of unruly, uncoooperative and destructive extras dressed in helmets and armor made this one of the most unsuccessful days the studio had with a large crowd of people in many year". Lee attempted to shoot battle footage again on August 22 and tried to film small groups of actors against process plates of previously shot battle scenes. As Lee's last two films for Universal exceeded their original budget, pressure was placed on Lee to cut some costs on
Tower of London. Universal told Lee to remove the child marriage scene, which Lee fought against. The studio and Lee eventually agreed to finish all scenes with the higher-salaried actors, starting with Karloff. Production completed on
Tower of London on September 4. The budget was exceeded by nearly $80,000.
Ford Beebe signed on to complete a few remaining shots.
Film score For the score of the film
Hans J. Salter used authentic period music for incidental music. When a preview screening for the film was shown in early November 1939, studio heads at Universal demanded new music written, but due to a lack of time, music from
Frank Skinner's
Son of Frankenstein was used, including a slightly altered title theme. ==Release==