IT'S THE RING OF THE BLACK NOBILITY!
https://en.wikipedia.org/wiki/Black_nobility
https://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_blacknobil01.htm
https://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_blacknobil05.htm
IT'S THE RING OF THE BLACK NOBILITY!
https://en.wikipedia.org/wiki/Black_nobility
https://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_blacknobil01.htm
https://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_blacknobil05.htm