When the Normans conquered England in 1066 (see Norman Conquest) they brought their Norman language with them. During the Anglo-Norman period which united insular and continental territories, the ruling class spoke Anglo-Norman, while the peasants spoke the English of the time. Anglo-Norman was the conduit for the introduction of French into England, aided by the circulation of Langue d'oïl literature from France. This led to many paired words of French and English origin.