What is the oldest written source in this country that mentions this right?

Nepal

The 1990 constitution was the first to protect privacy as a fundamental right. In Article 22: “Except as provided by law, the privacy of the person, house, property, document, correspondence or information of anyone is inviolable” (Constitution Net, “The Constitution of Nepal 1990”). In the 2015 constitution, the same language is used in Article 28 (Constitute Project, “Nepal 2015 rev. 2016").

https://www.constituteproject.org/constitution/Nepal_2016?lang=en https://constitutionnet.org/sites/default/files/1990_constitution_english.pdf

Privacy Rights · Country sources (all rights) · Years mentioned: 1990, 2015, 2016 · Last edited 2022-12-28 · Edit on GitHub