
Medieval philosophy is the philosophy that existed through the Middle Ages, the period roughly extending from the fall of the Western Roman Empire in the 5th century to the Renaissance in the 15th century. Medieval philosophy, understood as a project of independent philosophical inquiry, began in Baghdad, in the middle of the 8th century, and in France, in the itinerant court of Charlemagne, in the last quarter of the 8th century. It is defined partly by the process of rediscovering the ancient culture developed in Greece and Rome during the Classical period, and partly by the need to address theological problems and to integrate sacred doctrine with secular learning.

The unity of the intellect is a philosophical theory proposed by the Muslim medieval Andalusian philosopher Averroes (1126–1198), which asserted that all humans share the same intellect. Averroes expounded his theory in his long commentary of On the Soul to explain how universal knowledge is possible within the Aristotelian theory of mind. Averroes's theory was influenced by related ideas by previous thinkers such as Aristotle, Plotinus, Al-Farabi, Avicenna and Avempace.

Aztec philosophy was a school of philosophy that developed out of Aztec culture. The Aztecs had a well-developed school of philosophy, perhaps the most developed in the Americas and in many ways comparable to Ancient Greek philosophy, even amassing more texts than the ancient Greeks. Aztec cosmology was in some sense dualistic, but exhibited a less common form of it known as dialectical monism. Aztec philosophy also included ethics and aesthetics. It has been asserted that the central question in Aztec philosophy was how people can find stability and balance in an ephemeral world.

Buridan's Bridge is described by Jean Buridan, one of the most famous and influential philosophers of the Late Middle Ages, in his book Sophismata. It is a self-referential paradox that involves a proposition pronounced about an event that might or might not happen in the future.

The Renaissance was a period in European history marking the transition from the Middle Ages to modernity and covering the 15th and 16th centuries. It occurred after the Crisis of the Late Middle Ages and was associated with great social change. In addition to the standard periodization, proponents of a "long Renaissance" may put its beginning in the 14th century and its end in the 17th century. The traditional view focuses more on the early modern aspects of the Renaissance and argues that it was a break from the past, but many historians today focus more on its medieval aspects and argue that it was an extension of the Middle Ages.

Renaissance humanism was a revival in the study of classical antiquity, at first in Italy and then spreading across Western Europe in the 14th, 15th, and 16th centuries. Contemporary use of the term humanism is consistent with the historical use prominent in that period, while Renaissance humanism is a retronym used to distinguish it from later humanist developments. During the Renaissance period most humanists were religious, so their concern was to "purify and renew Christianity," not to do away with it. Their vision was to return ad fontes to the simplicity of the New Testament, bypassing the complexities of medieval theology. Today, by contrast, the term humanism has come to signify "a worldview which denies the existence or relevance of God, or which is committed to a purely secular outlook."

During the High Middle Ages, the Chartres Cathedral established the cathedral School of Chartres, an important center of French scholarship located in Paris. It developed and reached its apex during the transitional period of the 11th and 12th centuries, at the start of the Latin translation movement. This period was also right before the spread of medieval universities, which eventually superseded cathedral schools and monastic schools as the most important institutions of higher learning in the Latin West.

The School of Reims was the cathedral school of Reims Cathedral in France that was in operation during the Middle Ages. The term is also used of an artistic style in Carolingian art, lasting into Ottonian art in works such as the gold relief figures on the cover of the Codex Aureus of Echternach, which in fact were probably made in Trier in the 890s. Archbishop Ebbo promoted artistic production at the abbey at Hautvillers, near the city. Major works probably made there in the 9th century include: the Ebbo Gospels (816–835), the Utrecht Psalter, which was perhaps the most important of all Carolingian manuscripts, and the Bern Physiologus.

The school of St Victor was the medieval monastic school at the Augustinian abbey of St Victor in Paris. The name also refers to the Victorines, the group of philosophers and mystics based at this school as part of the University of Paris.

Scotistic realism is the Scotist position on the problem of universals. It is a form of moderate realism.

Univocity of being is the idea that words describing the properties of God mean the same thing as when they apply to people or things. It is associated with the doctrines of the Scholastic theologian John Duns Scotus.