Arepo is a display typeface inspired both by the Imperial Roman letter

and the forms of Giambattista Bodoni. It is part of the

Cycles, Stone Print, Arepo, SFPL constellation of typefaces.

Links

http://www.answers.com/topic/sator-arepo-tenet-opera-rotas

Bibliography

Max Caflisch, Schriftanalysen, Band 1,Typotron, St. Gallen, 2003, "Sumner Stones ungleiche Zwillinge: Cycles und Arepo."