Material things that can be perceived by the senses. In the context of art history or art information, the term may be restricted to works of art or cultural heritage, including architecture, art works such as paintings, drawings, graphic arts, sculpture, decorative arts, photographs, and other cultural artifacts. An object may be a single item or it may be made up of many physical parts.

Source: Art & Architecture Thesaurus

http://vocab.getty.edu/page/aat/300311889