The influence of French on English pertains mainly to its lexicon, including its orthography, and to some extent its syntax and pronunciation. Most of the French vocabulary in English entered the language after the Norman Conquest in 1066. Old French, specifically the Old Norman dialect, became the language of the new Anglo-Norman court, the government, and the elites. That period lasted for several centuries through the Hundred Years' War (1337–1453). However, English has continued to be influenced by French. Estimates of the proportion of English vocabulary that originates from French range from one third to two thirds.