Yes, polyphony was used during the Middle Ages. We do not have any real idea of when polyphony was introduced, but the earliest texts describing it date to the Early Middle Ages. By the end of the Middle Ages, it was highly developed. There is a link below to an article on polyphony, beginning at the section on its origins.
There was no explorers in the middle ages. When exploration started that is when the middle ages ended.
Before the middle ages was Anquity (Greeks and Romans) and after the middle ages was the Renissance
Barns where used for the animals and to keep the food there.
The simple answer is that the medieval period is also called the Middle Ages. There is some complexity, however. The period from the 5th through 10th centuries was called the Dark Ages, but the term Early Middle Ages is more common now. What used to be called the Middle Ages, a time from the 11th to 15th centuries, is now often counted as the High Middle Ages (1000 to 1300) and Late Middle Ages (1300 to some time in the 15th century).
Castles in the Middle Ages were used to keep out enemies.
See the question: What are some weapons used in the middle ages?
In the Middle Ages
people in the middle ages used letters or talking to face to face
because they used wood smoke as a deorderant in the middle ages
knights
YES
to entertain
Yes, polyphony was used during the Middle Ages. We do not have any real idea of when polyphony was introduced, but the earliest texts describing it date to the Early Middle Ages. By the end of the Middle Ages, it was highly developed. There is a link below to an article on polyphony, beginning at the section on its origins.
the middle ages
It was used in the middle ages by monks!
The period of time from 500 AD to 1500 AD is called the Middle Ages.