The original Danish text of the book “Prindsessen paa Ærten” authored by Hans Christian Andersen is/are in the public domain and not protected by copyright because at least 100 years (viz. 150) have passed since the author’s death in 1875.

The Spanish translation of the book “Prindsessen paa Ærten” (“La princesa sobre el guisante”) authored by Wikisource is/are distributed under the CC BY-SA 4.0 license.

Illustrations of the book “Prindsessen paa Ærten” authored by Vilhelm Pedersen is/are in the public domain and not protected by copyright because at least 100 years (viz. 166) have passed since the author’s death in 1859.