This is the only known Alamo film that was actually filmed at the Alamo. Except for four production stills and a small review buried in the Library of Congress, that is all that is known for certain about this lost independent production.
No known copy of this film exists; all that can be found are a few stills and a stock certificate issued to the "Siege and Fall of the Alamo Motion Picture Co." on November 17, 1913, located at the Daughters of the Republic of Texas Library (DRT). There's also a synopsis, written for copyright registration, which survives at the Library of Congress, in addition to a review and advert that ran at the time in the local paper, "San Antonio Light". Historians once doubted the film was ever made, but a careful examination of the items mentioned above finally proved otherwise.
According to an advert which appeared in the "San Antonio Light", the film was made with a cast of 2,000 actors, and cost more than $35,000 (roughly equivalent to $848,509 in 2016).