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The 11th century refers to the years 1000 to 1099 CE, a period of significant change in medieval Europe, Asia, and the Middle East. It matters because major events occurred during this time, including the Norman Conquest of England in 1066 and important developments in religion, politics, and society that shaped the modern world.
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Political boundaries in Eastern Hemisphere in early half of 11th century Political boundaries in Eastern Hemisphere at the end of the 11th century
The 11th century is the period from 1001 (represented by the Roman numerals MI) through 1100 (MC) in accordance with the Julian calendar, and the 1st century of the 2nd millennium.