Innovation and Adaptation in the Western Christian World, 600–1450 CE
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Those countries professing Christian beliefs under the primacy of the pope.

A medieval method of determining theological and philosophical truth by using Aristotelian logic.

The period 1378-1417, marked by divided papal allegiances in Latin Christendom.

An economic system characterized by private or corporate ownership of capital goods, by investments that are determined by private decision, and by prices, production, and the distribution of goods that are determined mainly by competition in a free market.

A written order issued by a court, commanding the party to whom it is addressed to perform or cease performing a specified act.

A representative assembly in England that, by the fourteenth century, was composed of great lords (both lay and ecclesiastical) and representatives from two other groups: shire knights and town burgesses.

A trade network of allied ports along the North Sea and Baltic coasts, founded in 1256.

An outward and physical sign of an inward and spiritual grace.

An arrangement in which vassals were protected and maintained by their lords, usually through the granting of fiefs, and required to serve under them in war.

A term initiated by William I to designate feudal vassals who held lands in return for service and loyalty to the king.

The medieval European system of self-sustaining agricultural estates.

The French representative assembly, composed of the three social "estates" in France, first convened by Philip IV.

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