A primary source is a record of an event, an occurrence, or a time period produced by a participant or observer at the time. Typically, primary sources include:

Tamayo, Rufino painter. Nature and the Artist; the Work of Art and the Observer. fresco painting (technique), 1943. Smith College Museum of Art (Northampton, Massachusetts, United States). src021701. Smith College Imaging Center Collection. Smith College Image Collections, JSTOR