Question: Who played the title role in the lost silent film based on a tragedy first performed in 1607 by the King's Men?  

Context paragraphs:
The Combat (film): The Combat is a lost silent film drama directed by Ralph Ince and starring Anita Stewart.  It was produced by the Vitagraph Company of America.

Across the Continent: Across the Continent is a lost silent film released by Paramount Pictures in June 1922, and was one of star Wallace Reid's last performances.

The Lost Bridegroom: The Lost Bridegroom a 1916 silent comedy film produced by Adolph Zukor starring John Barrymore.  Appearing alongside Barrymore in this film is his first wife Katherine Corri Harris.  The short story titled "The Man Who Was Lost" was by Willard Mack with James Kirkwood as director.  The film had an alternative title "His Lost Self" and was rereleased by Paramount on April 17, 1919 as part of their "Success Series", a celebration of some of the company's early screen triumphs.  Though it obviously still existed by 1919, it is a lost silent film today.

Days Between Stations (novel): Days Between Stations is the first novel by Steve Erickson.  Upon publication in 1985 it received notable praise from Thomas Pynchon and has been cited as an influence by novelists such as Jonathan Lethem and Mark Z. Danielewski.  It has been translated into French, Spanish, Italian, Russian and Japanese.  Several stories intersect in this novel: Lauren and Jason's unhappy marriage, Lauren's love affair with Adrien-Michel, and a lost silent film titled "The Death of Marat".

The Cry of the Weak: The Cry of the Weak is a lost silent film drama directed by George Fitzmaurice, scripted by Ouida Bergere and starring Fannie Ward.  Astra Films produced and Pathé Exchange distributed.

Antony and Cleopatra: Antony and Cleopatra is a tragedy by William Shakespeare.  The play was performed first circa 1607 at the Blackfriars Theatre or the Globe Theatre by the King's Men.

The American (1927 film): The American, a.k.a.  The Flag Maker, (1927) is a lost silent film western directed by J. Stuart Blackton and starring Bessie Love and Charles Ray.

The Morals of Marcus (1915 film): The Morals of Marcus(1915) is a lost silent film comedy-drama produced by the Famous Players Film Company and distributed by Paramount Pictures.  It is based on a 1905 novel by William John Locke, "The Morals of Marcus Ordeyne", which was later produced on Broadway in 1907.  The star of the play was Marie Doro who makes her motion picture debut in this film version.  Both Edwin S. Porter and Hugh Ford take part in the direction of the film.  The story was remade in 1921 as "Morals" with May McAvoy and in 1935 as "The Morals of Marcus" with Lupe Velez.

Cleopatra (1917 film): Cleopatra (1917) was an American silent historical drama film based on H. Rider Haggard's 1889 novel "Cleopatra" and the plays "Cleopatre" by Émile Moreau and Victorien Sardou and "Antony and Cleopatra" by William Shakespeare.  The film starred Theda Bara in the title role, Fritz Leiber, Sr. as Julius Caesar, and Thurston Hall as Mark Antony.  The film is now considered lost, with only fragments surviving.

The Profiteers: The Profiteers is a lost silent film drama directed by George Fitzmaurice and starring Fannie Ward.  It was produced by Astra Films and released through Pathé Exchange.

Supporting paragraphs: Cleopatra (1917 film) Antony and Cleopatra
Answer: Theda Bara