Harrison Mandel

An art lover and his companion visited an art gallery in Paris in 1979 where they mistook the Doctor's TARDIS, which had been parked in the gallery, as just another exhibit.

The man proclaimed that "since it has no call to be here, the art lies in the fact that it is here." At that moment the Fourth Doctor, Romana II, and Duggan entered the TARDIS and it dematerialised. The art lovers seemed to admire the TARDIS' disappearance as just another aspect of the art. (TV: City of Death)

Behind the scenes
Both the male and female art lover characters were unnamed in City of Death. John Cleese and Eleanor Bron shared the collective credit "Art lovers".