 Extensive research was done to provide accuracy. The writers had a  bibliography of 372 books. Art director Anton Grot (qv) made 3643  sketches from which 7360 blueprints were prepared for exterior and  interior settings. A complete Mexican village was built on the  Warner ranch. An English version of Franz Werfel (qv)s play  opened in New York City on 11 October 1926 and had 48 performances.  The cast included Alfred Lunt (qv) and Edward G. Robinson (qv).