The folks who rank as internet celebrities in Sight Unseen’s world — usually those with a killer eye and a massive following on Tumblr or Instagram — would no doubt seem obscure to most. But even our regular readers might be surprised by today's unconventional yet equally influential story subject. A few years ago, after stumbling across some articles about mathematician Father Magnus Wenninger on the web, we added him to our “Minnesota” file, whose sole other occupant at the time was RO/LU; earlier this summer, we finally had an occasion to open said file when SU contributor Debbie Carlos asked if she could shoot anything for us there. Carlos was game enough to track down the nonagenarian priest — who became a cult figure in the mathematics world (and later in the online world) for his elaborate paper-polyhedron models — in his home at St. John’s Abbey outside Minneapolis. Not only did she photograph Wenninger and his works, she got him to open up about his history and his methodology as well.