did and important revolutions which have changed the state of the
world. The space of the lost provinces was immediately replenished with
new colonies and rising kingdoms: the active virtues of peace and war
deserted from the vanquished to the victorious nations; and it is in
their origin and conquests, in their religion and government, that
we must explore the causes and effects of the decline and fall of the
Eastern empire. Nor will this scope of narrative, the riches and
variety of these materials, be incompatible with the unity of design
and composition. As, in his daily prayers, the Mussulman of Fez or Delhi
still turns his face towards the temple of Mecca, the historian's eye
shall be always fixed on the city of Constantinople. The excursive line
may embrace the wilds of Arabia and Tartary, but the circle will be
ultimately reduced to the decreasing limit of the Roman monarchy.

On this principle I shall now establish the plan of the last two volumes
of the present work. The first chapter will contain, in a regular
series, the emperors who reigned at Constantinople during a period of
six hundred years, from the days of Heraclius to the Latin conquest;
a rapid abstract, which may be supported by a _general_ appeal to the
order and text of the original historians. In this introduction, I
shall confine myself to the revolutions of the throne, the succession
of families, the personal characters of the Greek princes, the mode
of their life and death, the maxims and influence of their domestic
government, and the tendency of their reign to accelerate or suspend the
downfall of the Eastern empire. Such a chronological review will serve
to illustrate the various argument of the subsequent chapters; and each
circumstance of the eventful story of the Barbarians will adapt itself
in a proper place to the Byzantine annals. The internal state of the
empire, and the dangerous heresy of the Paulicians, which shook the East
and enlightened the West, will be the subject of two separate chapters;
but these inquiries must be postponed till our further progress shall
have opened the view of the world in the ninth and tenth centuries of
the Christian area. After this foundation of Byzantine history, the
following nations will pass before our eyes, and each will occupy the
space to which it may be entitled by greatness or merit, or the degree
of connection with the Roman world and the present age. I. The Franks; a
general appellation wh