What empires arose in Europe in the Middle Ages?

The Middle Ages cover a fairly long period from the 6th to the 16th century AD, and Europe is geographically from Portugal to the Black Sea and from Malta to Iceland.
Consequently, even Byzantium, which existed until 1453, can be attributed to the empires, although it occupied a small territory for the last 100 years. And also the Ottoman Empire. She began to actively expand in the Balkans in the 15th century.
In addition, the Holy Roman Empire existed since 962, covering Germany, the Czech Republic and the adjacent territories of neighboring states.
The empire of Charlemagne reached its peak at the beginning of the 9th century, under its control were France, Belgium, Holland, northern Italy, Switzerland, Austria, Germany.
The Habsburg Empire during the reign of Charles V (XVI century, first half) covered Spain, Sardinia, Sicily, Austria, the Netherlands.