Reality is of little consequence on the stage and in “Maria.” It’s all about the raw feeling, which serves the movie well, more dream than history lesson about La Callas. Early on, she pops some Mandrax and tells her devoted butler Ferruccio (a simply wonderful Pierfrancesco Favino) that a television crew is on the way.

The important thing to know going into “Maria” is that it’s the third in a trilogy of films directed by the Chilean whirlwind Pablo Larraín that seek to recover the women behind the plaster saints of 20th-century iconography.