simulacrum [ˌsɪmyəˈleɪkrəm] n.
1.) A material image, made as a representation of some deity, person, or thing.
2.) Something having merely the form or appearance of a certain thing, without possessing its substance or proper qualities.
3.) A mere image, a specious imitation or likeness, of something (O.E.D. 2nd Ed.).
Etymology: Latin simulacrum, from simulare, to simulate + -crum, n. suffix.
"And yet after reading of him in scores of volumes, hunting him through old magazines and newspapers, having him here at a ball, there at a public dinner, there at races and so forth, you find you have nothingnothing but a coat and a wig and a mask smiling below itnothing but a great simulacrum" (The Four Georges, William Makepeace Thackeray, 1869).
Can't believe it has taken me this long to use a Caravaggio.