Over the two centuries Byzantium’s position in Italy had turned virtually
full circle, from the outwardly hopeful but in practice precarious position
of 680, to the verge of a new period of power and influence in the late ninth
century. Despite, and in some measure because of, the short-lived political
and ecclesiastical peace which prevailed at the beginning, discontent and
separatist feeling had grown rapidly. As a result of the election of local
military leaders as duces, the power of the emperor and his representative,
the exarch, had become marginal from the late 720s. The fall of Ravenna in
751 was only one stage in the fragmentation of the Byzantine territories, but
it did promote distinct development in each area.Only in the theme of Sicily
and the associated duchies of Calabria andOtranto was traditional imperial
control effective, assisted by a steady process of hellenisation. In Venetia
and the various component parts of the duchy ofNaples, nominal loyalty to
the empire survived side by side with growing economic sophistication and
political independence under leaders chosen locally from the traditional
military elite. Elsewhere, as in the exarchate, the Pentapolis and duchy of
Rome, the predominant power came into the hands of senior churchmen,
but these had to work out a modus vivendi with lay aristocratic families,
and with the Frankish rulers of the kingdom of Italy after 774. In each area,
however, developments were conditioned by the decentralisation underway
as early as the seventh century; and distinctive traditions and institutions,
more often Roman than strictly Byzantine, remained powerful, as can be
seen in the persistence of titles, names and legal institutions.
IfByzantium’s power and influencewere in decline for most of the period,
it remained a force to be reckoned with, as can be seen in its successful
defence of its interests in Venetia, and the preoccupation of both the Franks
and the popes with their relations with the empire. In the economic, artistic
and literary spheres, Byzantium’s impact was as considerable as ever, and
was channelled through Rome as much as through the nominally Byzantine
centres. Byzantine naval power was always significant, and it is this which
especially enabled the empire to come into its own again as a player on the
Italian scene in the second half of the ninth century. Byzantium’s position
was reinforced by the devastation of the Arab raids; by disenchantment
with Frankish political and military weakness; and by the aggressive yet
pragmatic policy pursued by Michael III (842–67) and Basil I (867–86).
The reconquest of much of the Lombard territories in Apulia, Calabria and
Lucania, including Bari and Taranto (retaken in 876 and 880 respectively)
ushered in a new era of Byzantine domination in southern Italy.