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{{rh||THE LATIN EMPIRE (1204–1261}|9}} of the first Latin emperor. He probably perished in prison in 1218.

Peter's successor, Robert of Courtenay, succeeded in finding his way to Constantinople, though not across Macedonia, accompanied by a number of troops furnished at the request of Pope Honorius the Third. His reign was a series of disasters. He made a treaty of peace with Theodore of Nicaea in order that he might devote all his attention to the defeat of the other Theodore, the despot of Epirus. The latter had been denounced by the pope for his detention of Peter and of the legate who accompanied him. Honorius indeed had invited the princes of the West to undertake a crusade for their deliverance. When, however, the legate was released, Peter seems to have been forgotten. The despot Theodore made a well-concerted attack upon Salonica, captured it, and was proclaimed emperor in 1222. Robert led all his forces against this new claimant for the imperial title and was badly beaten. Theodore pushed on to Adrianople and hoisted his standard on the walls of that city almost without opposition.

There were thus in 1222 four persons claiming to be emperors, and occupying separate portions of what had been twenty years earlier the Roman Empire in the East. These were Robert at Constantinople, Theodore at Nicaea, another Theodore at Salonica, and Alexis at Trebizond.

The history of the next forty years (1222–1261) is that of the strengthening of the Greek empire at Nicaea and the decadence and downfall of the other so-called empires, and especially of that of the Latin Crusaders in Constantinople. The successor of Theodore Lascaris was John Ducas Vataces, who during a reign of thirty-three years fortified his position at Nicaea and increased the prosperity of his empire. He restricted the boundaries of the Latin territory in Asia Minor to the peninsula formed by a line parallel to the Bosporus from Ismidt to the Black Sea. He rendered property and life safe, and in consequence the Greek population continued to flock into his territory. Even French soldiers in considerable numbers quietly slipped away from