Fall of an Empire. Byzantine lesson.

[Fed]

"Within the boundaries of greatly reduced split into parts of the Empire Palaeologus dynasty in the 14. Torn by civil unrest and strife on religious grounds.
   Emperors heavily dependent on loans to Venice and Genoa, or from the appropriation of wealth in private hands.
   Most trade on the territory of the empire was controlled by Venice and Genoa. At the end of the Middle Ages, the Byzantine church is much stronger, and its rigid opposition to the Roman church became one of the reasons why the Byzantine emperor and did not manage to achieve military aid from the West. "
  Indeed, even the usual academic article - nothing like.