Michelangelo was a Human artist of the 15th and 16th centuries, one of the greatest artists of the Renaissance period on Earth. He lived in the region known as Italy and is known for creating works such as the sculpture David. (TNG: "Birthright, Part I")
In 2367, Doctor Noonian Soong described his need to create Data as being no different to Michelangelo's need to creature sculptures from blocks of marble. (TNG: "Brothers")