John Field (1782–1837) was an Irish composer and pianist. He is best known for being the first musician to write nocturnes. Field marked a transition in classical music from an emphasis on technical virtuosity to lyrical expression, and paved way for composers like Chopin (of whom he was later quite critical). Field was born in Dublin on 26th July 1782, the eldest son of Protestant Irish parents. His father, Robert Field, earned his living by playing the violin in Dublin theatres.