The development of the English language in Britain was affected by a series of culture interactions. While England proper was settled mainly by speakers of Germanic languages, Ireland, Wales, and Scotland were primarily Celtic, as was Cornwall, and interaction with Celts affected some types of English culture and poetics. The Roman conquest of Britain added Latin vocabulary to the Germanic core of English, as did the influence of the Roman Catholic Church, especially after Augustine of Canterbury consolidated the church hierarchy in England. Viking contacts also influenced the development of Old English. The Norman Conquest of 1066 led to a transformation of the language due to continuing Norman influence. Both medieval and Renaissance scholars imported loan words and grammatical theories from Greek and Latin into English.