Middle English was a period between approximately 1150 to 1500 AD where English transitioned from Old English to Modern English. It was influenced by Old English and Old Norman French, resulting in a mixture of vocabulary from both languages as well as a simplification of grammar from Old English. Middle English grammar became closer to Modern English grammar, dropping some inflectional endings. Pronunciation of all letters was retained, unlike in Modern English. Geoffrey Chaucer is considered the greatest Middle English poet, best known for his work The Canterbury Tales, a collection of stories told as a story-telling contest by pilgrims traveling to Canterbury Cathedral.