Eleuterus
130 — 189
A Greek-born Pope from Nicopolis who served as deacon under Anicetus and Soter before succeeding Soter around 174. He navigated the early challenge of Montanism and, according to the Liber Pontificalis, received a letter from one 'Lucius, King of Britain' seeking missionaries — a tradition debated by historians but widely remembered in the early British church.