The Nicaea–Thessalonike Treaty: 1241, 1242, or 1243?
The 1230s and 1240s constituted a pivotal turning-point in the eastern Mediterranean, a decade in which the political map of the successor states that emerged from the Fourth Crusade was dramatically redrawn. Foremost among these transformations was the westward advance of the Nicaean exile-Byzantine polity into the Balkans—an expansion that set the stage for its…
