The document provides an overview of the Middle Ages in Europe from the decline of the Roman Empire to the late Middle Ages. It discusses the rise of barbarian tribes and new forms of government, the establishment of Constantinople as the new capital, the expanding influence of the Christian Church. Feudalism developed as a political and economic system defined by obligations between lords and vassals. The High Middle Ages saw the rise of royal dynasties and the establishment of laws to limit violence. The Late Middle Ages was defined by the Black Death pandemic that killed one-third of Europe's population and led to social changes.