According to Geanakoplos (Byzantine East and Latin West) a large community of Greek monks seems to have always been living in Rome. Besides that, until the 3th century Greek was the language of the Roman liturgy. Even today, in the office of the Great Friday in the Roman church one can listen a chant in both languages, first in Greek (Aghios Athanatos Eleison Emas) and then the same in Latin (Sanctus immortalis miserere nobis). Geanakoplos mentions also Wellesz (Eastern Elements in Western Chant), who writes about the use of the 3 Aghios (=sanctus) in the Roman church, until today.