The Old English period (449-1100) marks the migration of the English people to Britain, which was previously inhabited by Celts and later influenced by Roman invasions. The arrival of Germanic tribes, particularly the Angles, Saxons, and Jutes, led to the establishment of seven kingdoms and subsequent Viking conquests in the 8th century. Over time, the relationship between the Danes and English evolved, resulting in cultural and linguistic exchanges, as reflected in the four principal dialects of Old English.