Map of Europe in 1100 AD (1100 CE)

The Seljuk Empire, or the Great Seljuk Empire, was a high medieval, culturally Turco-Persian empire established and ruled by the Qïnïq branch of Oghuz Turks. 9 million square kilometres from Anatolia and the Levant in the west to the Hindu Kush in the east, and from Central Asia in the north to the Persian Gulf in the south, and covered the time period 1037–1308, though Seljuk rule beyond the Anatolian peninsula ended in 1194.

Mapped extent in 1100 CE: 3.04M km²

The Almoravid dynasty was a Berber Muslim dynasty centered in the territory of present-day Morocco. It established an empire that stretched over the western Maghreb and al-Andalus, starting in the 1050s and lasting until its fall to the Almohads in 1147.

Mapped extent in 1100 CE: 1.87M km²

Kievan Rus', also known as Kyivan Rus', was the first East Slavic state and, later, an amalgam of principalities, in Eastern Europe from the late 9th to the mid-13th century. Encompassing a variety of polities and peoples, including East Slavic, Norse, and Finnic, it was ruled by the Rurik dynasty, founded by the Varangian prince Rurik.

Mapped extent in 1100 CE: 1.20M km²

The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity comprising and controlling much of Central Europe and Western Europe, headed by the Holy Roman Emperor and characterized by a decentralized political structure. It developed in the Early Middle Ages, and lasted for a millennium until its dissolution in 1806 during the Napoleonic Wars.

Mapped extent in 1100 CE: 883,283 km²

The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Eastern part of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived the fall of the Western Roman Empire in the 5th century AD, it endured until the fall of Constantinople to the Ottoman Empire in 1453.

Mapped extent in 1100 CE: 702,872 km²

The Kingdom of Galicia–Volhynia, known as the Principality of Galicia–Volhynia before 1253, and also known as the Kingdom of Ruthenia or Kingdom of Rus', was a medieval state in Eastern Europe which existed from 1199 to 1349. Its territory was predominantly located in modern-day Ukraine, with parts in Belarus, Poland, Romania, Moldova, and Lithuania.

Mapped extent in 1100 CE: 407,528 km²