Art history not surprisingly is an interesting intersection of both visual art and cultural history and experience, and often the resources you draw from fit into an intersection of both.
Bear in mind that in the case of what we now regard as ancient or medieval art, the people creating it did not consider it to be art per se, but something created with another purpose in mind, such as ensuring a safe transition to the next world, or communicating a theology to a public audience.
Unknown Artist. Horse and Rider. Earthenware with traces of pigment. 31-1/2 x 29-3/4 x 11-1/2 in. (80.0 x 75.6 x 29.2 cm). Minneapolis Institute of Art. Minneapolis, Minnesota. https://collections.artsmia.org/art/59514/horse-and-rider-china. Accessed 6 Oct. 2023.
By searching relevant topics in the library catalog and adding the keyword <<sources>> to your search, you can find materials that contain primary sources. Hint: you can further limit your search by language by selecting languages in the left-hand navigation of your search results.
Below are some other places to find primary sources online.