Carbonaro Cipher

Almost identical to the Atbash Cipher, the Carbonaro Cipher is a simple substitution that swaps each letter in a standard alphabet with the letter in the same position of the Carbonaro alphabet (OPGTIVCHEJKRNMABQLZDUFWXYS). This cipher was used by Carboneria, a secret society established in Naples at the beginning of the 19th century. See more information here and here.