This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country (Mexico) on the URAA date (1 January 1996).
For background information, see the explanations on Non-U.S. copyrights. Note: This tag should not be used for sound recordings.
The photographical reproduction of this work is covered under the article 148, VII of the Mexican copyright law (Ley Federal de Derechos de Autor), which states that «Literary and artistic works already published may be used, provided that normal commercialization of the work is not affected, without authorization from the copyrightholder and without remuneration, invariably citing the source and without altering the work, only in the following cases: […] VII. Reproduction, communication, and distribution by means of drawings, paintings, photographs, and audiovisual means of works visible from public places».
See COM:CRT/Mexico#Freedom of panorama for more information.