Un Empereur de Byzance à Rome. - Halecki, Oskar, 1891-1973 (Variorum Reprints, 1972)
Reprint of the 1st ed. (Warsaw, Towarzystwo Naukowe Warszawskie, 1930) which was issued as v. 8 of Travaux historiques de la Société des sciences et des lettres de Varsovie.
Includes "Pieces justificatives" in Latin.