English: Newspaper ad for the 1967 grand opening of the Roxy Theater in Miami Beach, Florida.
Date
Source
The Miami News (defunct)
Author
Roxy Theater / The Miami News
The ad appeared in The Miami News 21 July 1967, so it can be dated from the publication date. It falls into the pre-1978 category. There are no copyright markings as can be seen at the full view link. The ad is not covered by any copyrights for The Miami News.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.