I have long wondered why no art historian has undertaken a serious study of the vast body of work depicting Middle-Earth.
Examples abound, of course. In addition to the aforementioned Olorin on Orthanc, let us not forget Michelangelo's great sculpture
Finrod This work is an idealized depiction of one of the greatest of the Firstborn, though unfortunately better known today by another name. During the recent restoration of the sculpture it became clear to all involved that its true subject was not, in fact, the biblical David, but instead the great Felagund. The confusion as to the name of the sculpture arises from a centuries-old poor translation from the Elvish, in which "Felagund" was misread as "stone-thrower." Art historians will no doubt rush to correct the hundreds of texts which name this sculpture incorrectly.