Above: The Exorcist opens at the Paramount Theatre in Memphis, Tennessee, in 1974. “Proof of age required”! The Paramount opened in 1964 and closed in 1990. According to Cinema Treasures, “no trace remains” except for this lone photograph.
Below: The Exorcist opens at the National Theatre in Westwood, California. The film received a limited release on December 26, 1973, and the National was one of the 26 participating theaters. The landmark was demolished in 2008, displaced by luxury apartments.
You can see more Exorcist marquees here, as well as video footage of audience reactions at the National and elsewhere.