<prompt> Translate the following text to SwahiliA staircase by the throne room leads to what Evans christened the piano nobile an upper floor of the west wing.  <response>: Ngazi iliyo karibu na chumba cha kiti cha enzi inaongoza kwenye kile ambacho Evans alikiita piano nobile, ghorofa ya juu ya mrengo wa magharibi. 