The term Hudson River School is used to designate a group of American landscape painters active in the mid-nineteenth century. The artists associated with the Hudson River School were a loosely-organized group based in New York City. The name “Hudson River School” is slightly misleading, particularly in its implied geographical and temporal limitations. The Hudson River Valley, from New York City to the Catskill Mountains and beyond, was the symbolic and physical center for many of the artists, but was by no means the only area that was visited and painted by these artists. Neither was it a school in the strictest sense of the word, because it was not centered in a specific academy or studio of an individual artist, or based on consistently espoused principles. Because the Hudson River School was never a formal artistic school, it is difficult to create an exhaustive list of all related artists.