This advantage, recalled by an old though erroneous 1 Servus is not cognate with servare, as has often been supposed; it is really related to the Homeric E'lpepos and the verb Etpw, with which the Latin sero is to be connected.
Bulls are written in the name of the pope, who styles himself "(Pius) Episcopus servus servorum Dei; (Pius), bishop, servant of the servants of God."
His role throughout his career was servus servorum dei; and the fact that he was this successively to Barnabas, Paul and Peter, helps to show the essential harmony of their message.
Servus, Geschichte des Fernrohrs, p. 77 seq.
" Pius P.P.X.," the signature of bulls is "Pius episcopas ecclesiae catholicae," and the heading, "Pius episcopus, servus servorum Dei," this latter formula going back to the time of St Gregory the Great.
Servus, a servant or slave).