Delta Solar was put on display in 1977 without copyright notice. Prior to 1978, when the definition changed, sculptures that were permanently installed in a public place were considered to be published. As such, Delta Solar is in the public domain because it was published in the United States between 1923 and 1977, inclusive, without a copyright notice.
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.
The author died in 1990, so this work is also in the public domain in jurisdictions where the copyright term is the author's life plus 30 years or less. This work may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/2.0CC BY 2.0 Creative Commons Attribution 2.0 truetrue
{{Information |Description= sculpture/construction by Otero in Washington D.C. |Source=[http://www.flickr.com/photos/67523311@N00/18271495/ Outside the museum] |Date=June 08, 2005 at 21:37 |Author=[http://www.flickr.com/people/67523311@N00 Pedro Vera] fro