Which film character was played by Lon Chaney Sr. in 1925?

The Phantom of the Opera is a 1925 American silent horror film adaptation of Gaston Leroux's 1910 novel Le Fantôme de l'Opéra, directed by Rupert Julian and starring Lon Chaney, Sr. in the title role of the deformed Phantom who haunts the Paris Opera House, causing murder and mayhem in an attempt to make the woman he "loves" a star. The film remains most famous for Chaney's ghastly, self-devised make-up, which was kept a studio secret until the film's premiere. The film was released on November 25, 1925.

Leonidas Frank "Lon" Chaney (April 1, 1883 – August 26, 1930) was an American stage and film actor, make-up artist, director and screenwriter. He is regarded as one of the most versatile and powerful actors of early cinema, renowned for his characterizations of tortured, often grotesque and afflicted characters, and his groundbreaking artistry with makeup. Chaney was known for his starring roles in such silent horror films as The Hunchback of Notre Dame (1923) and The Phantom of the Opera (1925). His ability to transform himself using makeup techniques he developed earned him the nickname "The Man of a Thousand Faces".