According to a 1923 interview with cinematographer Tony Gaudio, the Huguenot massacre scenes required 600 human extras and 400 horses. 80 electricians lit the scene using 7 generators and every available lamp at the studio. The ball scenes that take place at the Louvre required 300 dancers.
This film had it's world premiere showing on 6 August 1923 at the Apollo theatre in New York.
(Evening Telegram, ((New York, NY)) 21 July 1923)
Josephine Crowell played the same character (Catherine de Medici) in D.W. Griffith Intolerance (1916).
Although Norma Talmadge is the star, she doesn't make her first appearance until about the 25-minute mark.
The film takes place in 1572.