  While Roman Empire used military for offence, Byzantines developed defensive way of battle. Warfare

  In both Empires the emperor held all power with the senate only an advisory institution. Goverment

  Roman Empire was divided into provinces which were political, but Byzantine Empire was divided into themes which were based according to which area which army occupied. Ruling parts of empire

  While old romans believed in many gods, Byzantines already accepted Christianity. Religion

  Marsh, Frank. The founding of the Roman Empire. Austin: THE UNIVERSITY OF TEXAS, Print  Haldon, John. Warfare, state and society in the Byzantine world. UK and USA: UCL press, Print  “Rome Vs. Byzantine Empire Compare and Contrast.“ Writework. Web [ byzantine-empire-compare-and-contrast]  “Roman religion.“ Roman Empire. Web [ empire.net/religion/religion.html]  “The Byzantine Empire: Constantinople as the Center of Christianity.” Hub pages. Web [ Center-of-Christianity] Sources

  “Roman Empire.“ Ministry127. Web [ empire]  ”Roman culture.” squidoo. Web [  “Roman religion.” SPQR Nova Roma. Web [  “Roman provinces.” Utexas. Web [ /provinces.html]  “Byzantine Empire Double Headed Eagle Seal.” devianart. Web [ Empire-Double-Headed-Eagle-Seal ] Sources pictures

  “The Byzantine Empire themes or themata 950.” zonu. Web [ /The-Byzantine-Empire-themes-or-themata-950.html]  “The Grand Strategy of the Byzantine Empire.” Open Letters Monthly. Web [  “Greek Fire: The Byzantine Secret Weapon.” Neo Byzantium. Web [ byzantine-secret-weapon/] Sources pictures