Magnus of Cuneo (Italian: San Magno) is venerated as a martyr and member of the legendary Theban Legion.

The center of his cult is situated at the mountain sanctuary known as the Santuario di San Magno, in the Valle Grana, Castelmagno, in the province of Cuneo.

The legion is supposed to have been decimated at Agaunum in 286 AD, but Magnus fled to the mountains of Piedmont, preaching the Christian religion in the Alps.

[2] As Damiano Pomi points out, neither documentary nor archaeological evidence supports the connection between Magnus and the Theban Legion.

[2] However, due to his association with the Theban Legion, Magnus was depicted as a Roman soldier holding a banner and the palm of martyrdom.