BritLibRoyal14CVIIFol006rMattParisSelfPort[1]

Lacking a picture of Peter of Ireland, here is a self-portrait, by Matthew of Paris 1200–59, a Benedictine scholar.

Picture from wiki http://upload.wikimedia.org/wikipedia/commons/8/88/BritLibRoyal14CVIIFol006rMattParisSelfPort.jpg