Mientras dure la guerra

An important part of the movie is set in the town of Salamanca, being the Main or Major Square (Plaza Mayor) widely relevant. It was actually shot in that very square, although the vegetation shown had to be added as in the moment of shooting the square had none.

Despite the high precision with which some key moments in this film are traced, such as the fact that Unamuno used the letter from the widow of the Protestant pastor Atilano Coco to write the draft of his speech, it is not true that Millán Astray bellowed "España Una, Grande, Libre" (Spain One, Great and Free) after the writer's harangue, since this nationalist phrase was not yet pronounced at state events, only at those held by the Falange. He did shout instead patriotic proclamations.