Por-bazhyn: a construção misteriosa na Sibéria é um complexo Russo?

https://www.news.com.au/travel/destinations/por-bajin-the-mystery-hidden-in-siberia/news-story/1fa82c007d1fc8e22bda12b9874313de
https://www.heritagedaily.com/2021/03/por-bazhyn-the-mysterious-island-fortress-in-siberia/138434
https://www.escape.com.au/destinations/asia/por-bajin-the-mystery-hidden-in-siberia/news-story/1fa82c007d1fc8e22bda12b9874313de
http://www.ancientarchitects.co.uk/2021/12/the-mysterious-lost-island-palace-of.html
https://www.archaeology.org/issues/394-2009/digs/8931-digs-siberia-por-bajin
https://siberiantimes.com/other/others/features/mysterious-mountain-palace-one-of-the-wonders-of-siberia-was-built-in-777-ad/?nf=Features
https://www.historicmysteries.com/por-bazhyn/
https://br.rbth.com/historia/87430-por-bajin-a-misteriosa-fortaleza
https://www.ancient-origins.net/news-history-archaeology/1300-year-old-fortress-structure-siberian-lake-013323
https://www.thearchaeologist.org/blog/por-bazhyn-the-mysterious-island-fortress-in-siberia
https://www.atlasobscura.com/places/por-bajin
https://archive.archaeology.org/1011/etc/letter.html
https://aventurasnahistoria.uol.com.br/noticias/historia-hoje/enigma-arqueologico-de-complexo-medieval-e-desvendado-na-siberia.phtml