What cultural achievements (material and spiritual) were created in the Middle Ages?

During the Middle Ages, that is, from 476 to 1492, the following objects of material culture were created:

Sophia Cathedral in Constantinople (VI century), from the middle of the XV century, rebuilt into a mosque. Many Byzantine churches throughout the empire.
Numerous castles in England, France, Germany, Italy, Czech Republic, Spain. They were less popular in Scandinavia and Ireland.
Cathedrals, for example Milan and Cologne. Or three Sophia Cathedrals of pre-Mongol Rus (Kiev, Novgorod, Polotsk).

Spiritual culture:

The Scandinavian sagas, they gave material about the Viking expeditions to Newfoundland, then thanks to these sagas, they found settlements of the beginning of the 11th century.
Theater, poetry (for example, “Divine Comedy”), theology, religious polemics, the idea of ​​”Moscow – the Third Rome”, philosophy (Arab, Catholic European, Orthodox).