Byzantine Empire

"In 1204, the Crusaders seized Constantinople army. Byzantium was divided into a number of states – the Latin Empire and the Achaean Principality created on the territories captured by the Crusaders, and the Nicene, Trebizond and Epirus Empire – remained under the control of the Greeks. "(Wikipedia) It turns out that the Byzantine Empire as the state ceased to exist, but who was his successor? Successor of the Byzantine Empire became Nicaean, at least, so says the modern history. Who rules Nike in 1237? "John III Ducas Vatats – Nicene emperor in 1221-1254, respectively." (Wikipedia). Letters, denoting the sound i in the Greek language is not as sound, so the name of the Emperor in the original sounds like "Batats." If you add the title of "Caesar" or "king", it becomes even clearer. What could lead to Russia Nicene Emperor? "History of Byzantium" (Vol. 3, collection) tells us: "During the summer of 1235 and Vatats Assen (Bulgaria) took a large part of the Latins Thrace. The boundary between Bulgaria and the Western Empire became possessions of the Nicene river Mariza in its lower reaches from the mouth to nearly Didimotiki. Violent Thracian fortress was besieged by the Latins Tsurul Vatatsem. In his campaigns against the Latins in 1235 and 1236's. Allies reached the walls of Constantinople. "From there, we know in the spring of 1237 the Bulgarian tsar Assen dissolved the alliance with the Nicene emperor. That same year, Pope, under the threat of a crusade, requires adherence to the Nicene emperor of the Roman Church.