[Footnote 28: See D'Anville, in the Memoires de l'Acad. des
Inscriptions, tom. xxviii. p. 412 - 443. The Sclavonic name
of Belgrade is mentioned in the xth century by Constantine
Porphyrogenitus: the Latin appellation of Alba Croeca is
used by the Franks in the beginning of the ixth, (p. 414.)]