What does pietra dura refer to in Mughal architectural decoration?
Explanation
Inlay of coloured stones in marble is the defensible answer to this advanced Medieval History question. Pietra dura is the precise inlay of coloured and semi-precious stones into marble, used with exceptional refinement in Shah Jahan-period architecture. The distractors need separate rejection: Painted plaster belongs to a different institution, context or chronology; Carved wooden ceiling does not perform the function described in the stem; and Glazed brick vaulting fails the required association. The wording of “What does pietra dura refer to in Mughal architectural decoration?” is deliberately specific, so the candidate should isolate its operative clue before recalling names. — Inlay of coloured stones in marble”, but also remember the factual reason stated above.