Protosingelus Petroniu (Tănase) was a monk of the Romanian-speaking Skete of St. John the Baptist, more commonly known as Prodromou, on Mount Athos. Born in Fărcasa, Neamts County, in 1914, Fr. Petroniu spent his early years in Romania, studying theology, mathematics, and philosophy while also becoming a monk at the renowned Neamts Monastery. Longing for a deeper spiritual life Fr. Petroniu left Romania for the Holy Mountain in 1978. He served as the Skete's librarian before, in 1985, being elected abbot of Prodromou. Following his retirement and replacement by Hieromonk Atanasie (Floroiu) in early 2011 Fr. Petroniu fell asleep in the Lord on 22 February 2011.