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 Portuguese translation of the book “Prindsessen paa Ærten” (“A princesa e a ervilha”) authored by Wikisource is/are distributed under the CC BY-SA 4.0 license.

The German translation of the book “Prindsessen paa Ærten” (“Die Prinzessin auf der Erbse”) is/are distributed under the CC0 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.