[Footnote 41: Compescuit tale consilium Pontifex, sperans
conversionem principis, (Anastas. p. 156.) Sed ne
desisterent ab amore et fide R. J. admonebat, (p. 157.) The
popes style Leo and Constantine Copronymus, Imperatores et
Domini, with the strange epithet of Piissimi. A famous
Mosaic of the Lateran (A.D. 798) represents Christ, who
delivers the keys to St. Peter and the banner to Constantine
V. (Muratori, Annali d'Italia, tom. vi. p. 337.)]