As a means of recording the passage of Time , the 11th century was that Century which lasted from 1001 to 1100 . In the history of European culture, this period is considered the early part of the High Middle Ages .
1054 , the Great Schism , in which the Western ( Roman Catholic ) and Eastern Orthodox churches separated from each other. Similar schisms in the past had been later repaired, but this one continues after nearly 1000 years.
