The artist of the painting 'CHRISTINA's World' is Andrew Wyeth. Wyeth was an American realist painter and one of the most popular artists of the 20th century. He was born in 1917 and died in 2009. He was known for his works depicting the rural people and landscapes of Pennsylvania, Maine, and New England. His painting 'CHRISTINA's World' is one of his most famous works and is now part of the permanent collection of the Museum of Modern Art in New York City.